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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Python Code Lab</title>
<link rel="manifest" href="pythoncopy.webmanifest">
<link rel="icon" type="image/svg+xml"
href="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233b82f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m10 2 6 16'/%3E%3Cpath d='m14 2-6 16'/%3E%3Cpath d='M18 12h-4'/%3E%3Cpath d='M20 9h-4'/%3E%3Cpath d='M22 6h-4'/%3E%3Cpath d='M6 15H2'/%3E%3Cpath d='M4 12H2'/%3E%3Cpath d='M2 9h2'/%3E%3C/svg%3E">
<meta name="theme-color" content="#3b82f6">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-title" content="Python Code Lab">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/themes/prism-tomorrow.min.css"
id="prism-theme">
<link rel="stylesheet" href="pythoncopy.css">
<style id="dynamicLinksStyle">
/* Extra dynamic overrides if needed */
</style>
<script>
window.addEventListener('load', () => {
if (window.pythonCopyVersion !== 25) {
console.warn('Stale pythoncopy.js version detected. Cleaning cache and reloading...');
if ('serviceWorker' in navigator) {
navigator.serviceWorker.getRegistrations().then(registrations => {
const promises = registrations.map(r => r.unregister());
Promise.all(promises).then(() => {
if ('caches' in window) {
caches.keys().then(names => {
Promise.all(names.map(name => caches.delete(name))).then(() => {
window.location.reload();
});
});
} else {
window.location.reload();
}
});
});
} else {
if ('caches' in window) {
caches.keys().then(names => {
Promise.all(names.map(name => caches.delete(name))).then(() => {
window.location.reload();
});
});
} else {
window.location.reload();
}
}
}
});
</script>
</head>
<body>
<header id="modeHeader">
<div class="brand">
<svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"
stroke-linecap="round" stroke-linejoin="round" style="color: var(--primary-color)">
<path d="m10 2 6 16" />
<path d="m14 2-6 16" />
<path d="M18 12h-4" />
<path d="M20 9h-4" />
<path d="M22 6h-4" />
<path d="M6 15H2" />
<path d="M4 12H2" />
<path d="M2 9h2" />
</svg>
Python Code Lab 4.14
<span class="mode-badge edit-badge">Edit</span>
<span class="mode-badge display-badge">Display</span>
<span class="mode-badge turtle-badge">Turtle</span>
</div>
<div class="visual-controls">
<div class="mode-toggle-pill" id="modeTogglePill">
<button class="mode-btn active" id="btnEditMode" onclick="setAppMode('edit')">Edit</button>
<button class="mode-btn" id="btnDisplayMode" onclick="setAppMode('display')">Display</button>
<button class="mode-btn" id="btnTurtleMode" onclick="setAppMode('turtle')">Turtle</button>
</div>
<div id="blocksTabHeader" style="display: none; align-items: center; gap: 12px; margin-left: auto;">
<span style="font-weight: bold; color: var(--primary-color);">Blocks Editor</span>
<input type="file" id="uploadBlocksInput" accept=".blocks,.xml" style="display: none;">
<button id="blocksUploadFileButton"
style="background: #7c3aed; color: white; font-weight: bold; padding: 6px 14px; border: none; border-radius: 20px; cursor: pointer; box-shadow: 0 2px 4px rgba(0,0,0,0.15);">Upload
Blocks</button>
<button id="blocksDownloadFileButton"
style="background: #7c3aed; color: white; font-weight: bold; padding: 6px 14px; border: none; border-radius: 20px; cursor: pointer; box-shadow: 0 2px 4px rgba(0,0,0,0.15);">Download
Blocks</button>
<button id="applyBlocksButton"
style="background: #10b981; color: white; font-weight: bold; padding: 6px 16px; border: none; border-radius: 20px; cursor: pointer; box-shadow: 0 2px 4px rgba(0,0,0,0.15);">Ready
to code with text!</button>
</div>
<div class="mode-toggle-pill">
<button class="mode-btn" id="fullscreenButton" title="Full Screen"
style="font-size: 18px; padding: 2px 12px;">⛶</button>
</div>
<div class="theme-toggle" aria-label="Theme">
<label><input type="radio" id="light-mode" name="mode" value="light" checked> Light</label>
<label><input type="radio" id="dark-mode" name="mode" value="dark"> Dark</label>
</div>
<div class="font-size-control">
<label for="font-size" style="font-size: 12px;">A</label>
<input type="range" id="font-size" min="10" max="40" value="16" style="width: 100px;">
<label for="font-size" style="font-size: 16px;">A</label>
</div>
<a href="pythoncopy.html?blank" target="_blank" title="New Blank File"
style="text-decoration: none; background: none; border: none; cursor: pointer; color: var(--primary-color); display: flex; align-items: center; padding: 4px 8px; font-size: 20px; margin-left: auto;">
<img class="header-action-icon" src="images/blank.png" alt="New Blank File">
</a>
<a href="pythoncopy.html" target="_blank" title="Clean Home Screen"
style="text-decoration: none; background: none; border: none; cursor: pointer; color: var(--primary-color); display: flex; align-items: center; padding: 4px 8px; font-size: 20px;">
<img class="header-action-icon" src="images/home.png" alt="Clean Home Screen">
</a>
<a href="pythonmanual.html" target="_blank" title="Python Manual"
style="text-decoration: none; background: none; border: none; cursor: pointer; color: var(--primary-color); display: flex; align-items: center; padding: 4px 8px; font-size: 20px;">
<img class="header-action-icon" src="images/manual.png" alt="Python Manual">
</a>
</div>
</header>
<div class="instructions-panel" id="instructionsPanel">
<div style="text-align: center; margin-bottom: 24px;">
<h2>Welcome to Python Code Lab! 🐍</h2>
<p style="margin: 8px 0 0 0; font-size: 15px; line-height: 1.5;">
Write, run, and step-trace your Python code using text or visual blocks. Browse the slides below to see what you
can do!
</p>
</div>
<div class="carousel-container">
<div class="carousel-track" id="carouselTrack">
<!-- Loaded dynamically from pythoncopycarousel.fragment -->
</div>
</div>
</div>
<div class="starter-panel" id="starterPanel">
<div class="starter-hero">
<div>
<p class="starter-kicker">Python Code Lab 4.13</p>
<h3>Start coding</h3>
<p>Choose a blank workspace, a challenge, a course, or one of the algorithm practice sections below.</p>
</div>
<div class="quick-action-row">
<button class="starter-button action-primary" data-action="blank">Blank File</button>
<button class="starter-button action-blocks" data-action="blocks">Use Blocks</button>
<button class="starter-button action-flowchart" data-action="flowchart">Create Flowchart</button>
<button class="starter-button action-parsons" data-action="parsons">Create Parsons</button>
<button class="starter-button action-list" data-action="create-list">Create List</button>
<button class="starter-button action-phone" data-action="phone-editor">Phone Mode</button>
<a class="starter-button action-manual" href="pythonmanual.html" target="_blank" rel="noopener">Manual</a>
</div>
</div>
<!-- Daily Challenge of the Day -->
<div class="daily-challenge-card" id="dailyChallengeCard">
<div class="daily-challenge-content">
<div class="daily-challenge-text">
<div class="daily-challenge-header">
<span class="daily-challenge-badge">📅 Daily Coding Quest</span>
<span id="dailyChallengeSpice">🌶️</span>
</div>
<h4 class="daily-challenge-title" id="dailyChallengeTitle">Loading today's challenge...</h4>
<p class="daily-challenge-desc" id="dailyChallengeDesc">Please wait while the challenge is prepared...</p>
<div class="daily-challenge-actions">
<a href="#" target="_blank" class="daily-challenge-btn" id="dailyChallengeBtn">
Accept Challenge ⚡
</a>
<a href="challenge_list.html" target="_blank" class="daily-challenge-view-all">
Explore All Quests
</a>
</div>
</div>
<div class="daily-challenge-image-container">
<img class="daily-challenge-image" src="challenge.png" alt="Daily Challenge Quest"
onerror="this.parentNode.style.display='none'">
</div>
</div>
</div>
<!-- Featured Courses Section -->
<p class="starter-section-title">Featured Courses</p>
<div class="courses-area" style="margin-bottom: 20px;">
<a href="fstrings/index.html" class="course-button">
<img src="fstrings/fstring_comics.jpg" alt="F-String Comic Academy" class="course-button-image"
style="object-fit: cover;">
<div class="course-button-content">
<h4 class="course-button-title">F-String Comic Academy ⚡</h4>
<p class="course-button-desc">Learn Python f-strings through 10 comic-themed levels featuring Byte and Pixel!
</p>
</div>
</a>
<a href="worldcup_manager/index.html" class="course-button">
<img src="worldcup_manager/worldcupheroimage.jpg" alt="World Cup Dream Manager" class="course-button-image">
<div class="course-button-content">
<h4 class="course-button-title">World Cup Dream Manager 🏆</h4>
<p class="course-button-desc">Build a tournament simulation with Python logic, lists, and vector graphics!</p>
</div>
</a>
<a href="top10_python_errors_course/index.html" class="course-button">
<img src="top10_python_errors_course/Top10HeroImage.png" alt="Python Error Detectives"
class="course-button-image" style="object-fit: contain; background: #021137;">
<div class="course-button-content">
<h4 class="course-button-title">Python Error Detectives 🔍</h4>
<p class="course-button-desc">Become a code detective! Find and fix the top 10 most common errors made by
beginner Python programmers.</p>
</div>
</a>
<a href="turtle_course/index.html" class="course-button">
<img src="turtle_course/images/06_circles.png" alt="Python Turtle Graphics" class="course-button-image"
style="object-fit: cover; background: #e6f2ee;">
<div class="course-button-content">
<h4 class="course-button-title">Python Turtle Graphics 🐢</h4>
<p class="course-button-desc">Create colorful vector art while learning loops, variables, coordinates, and
custom procedures!</p>
</div>
</a>
</div>
<details class="starter-section" open>
<summary>iGCSE Algorithms</summary>
<section class="igcse-lab" aria-label="iGCSE algorithm choices">
<div class="igcse-grid">
<div class="igcse-card">
<h5>Average</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/average.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-average.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/average.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/average.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>Bubble Sort</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/bubble">Text</button>
<button class="starter-button" data-url="blocks/igcse-bubble-sort.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/bubble">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/bubble">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>Counting</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/Counting.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-counting.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/Counting.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/Counting.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>For Loop</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/540f258d395da98ce979a8a328a55ae1659c3de7/forloop.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-for-loop.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/540f258d395da98ce979a8a328a55ae1659c3de7/forloop.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/540f258d395da98ce979a8a328a55ae1659c3de7/forloop.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>If Else</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/ifelse.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-if-else.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/ifelse.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/ifelse.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>Linear Search</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/linear.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-linear-search.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/linear.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/linear.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>Maximum and Minimum</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/MaximumandMinimum.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-maximum-minimum.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/MaximumandMinimum.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/MaximumandMinimum.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>Repeat Until</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/repeat.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-repeat-until.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/repeat.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/repeat.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>Totalling</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/Totalling.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-totalling.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/Totalling.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/Totalling.py">Parsons</button>
</div>
</div>
<div class="igcse-card">
<h5>While Loop</h5>
<div class="igcse-actions">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/whileloop.py">Text</button>
<button class="starter-button" data-url="blocks/igcse-while-loop.blocks">Blocks</button>
<button class="starter-button" data-action="flowchart"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/whileloop.py">Flowchart</button>
<button class="starter-button" data-action="parsons"
data-url="https://gist.githubusercontent.com/jamesabela/53cc928fd03720c0803839b31bcda287/raw/635a2c7b12a1a6af75623d65d41889e8e1bbce96/whileloop.py">Parsons</button>
</div>
</div>
</div>
</section>
</details>
<details class="starter-section">
<summary>Turtle Graphics</summary>
<div class="starter-grid" style="margin-bottom: 16px;">
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/6b44d12f117fc4081f9de784b85a4882a631d65c/bubbleturtle.py">Bubble
Turtle</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/d58dbb7164039c481ac8490c045e26093436d4f4/confetti.py">Confetti</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/d58dbb7164039c481ac8490c045e26093436d4f4/fills.py">Fills</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/d58dbb7164039c481ac8490c045e26093436d4f4/grid.py">Grid</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/669f0f2f5c67b4cf992667c40c6d24f281821829/hypno.py">Hypno</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/d58dbb7164039c481ac8490c045e26093436d4f4/maze.py">Maze</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/d58dbb7164039c481ac8490c045e26093436d4f4/nightcity.py">Night
City</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/9bedd81f6f94c6b94119e5a1422eaad88fb27c9c/spsquare.py">Spiral
Square</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/9df6cf58b3e46082f2b27dc3bbf7b0f301b8dfc2/squaredfunc.py">Squared
Func</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/d58dbb7164039c481ac8490c045e26093436d4f4/squarepuzzle.py">Square
Puzzle</button>
<button class="starter-button"
data-url="https://gist.githubusercontent.com/jamesabela/47b5a7307f549765afddc3ea046d05bc/raw/d58dbb7164039c481ac8490c045e26093436d4f4/steve.py">Steve</button>
</div>
</details>
<details class="starter-section">
<summary>Python Examples</summary>
<div class="starter-grid" style="margin-bottom: 16px;">
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/examples/caesar.py">Caesar
Cipher</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/examples/maze.py">Maze
Solver</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/examples/pet.py">Virtual
Pet</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/examples/rock.py">Rock Paper
Scissors</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/examples/wordle.py">Wordle</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/examples/primes.py">Primes</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/examples/file_load.py">File
Handling</button>
</div>
</details>
<details class="starter-section">
<summary>Blocks Examples</summary>
<div class="starter-grid">
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/gcse-count-occurrences.blocks">Count
Occurrences</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/gcse-find-largest.blocks">Find
Largest</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/gcse-linear-search.blocks">Linear
Search</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/gcse-random-guess.blocks">Random
Guess</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/gcse-turtle-filled-square.blocks">Turtle
Filled Square</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/greeting.blocks">Greeting</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/Letters.blocks">Letters</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/recursive-tree.blocks">Recursive
Tree</button>
<button class="starter-button"
data-url="https://raw.githubusercontent.com/jamesabela/jsfun/refs/heads/main/blocks/sierpinski.blocks">Sierpinski
Triangle</button>
</div>
</details>
</div>
<div class="workspace" id="workspace">
<div class="workspace-toolbar">
<div class="button-row">
<button class="primary-button" id="copyButton">Copy Code</button>
<button class="primary-button" id="copyForDocsButton" style="background: #8b5cf6;"
title="Copy with formatting and line numbers for Word/Google Docs">Copy for Docs</button>
<button class="primary-button" id="shareLinkButton" style="background: #10b981;"
title="Copy a shareable link that loads this code directly in Python Code Lab">Copy Link</button>
<button class="primary-button" id="createFlowchartButton" style="background: #f59e0b; display: none;"
title="Create a visual flowchart from this code (limited to 30 lines)">Create Flowchart</button>
<input type="file" id="uploadPyInput" accept=".py,.txt" style="display: none;">
<button class="primary-button" id="uploadPyButton">Upload .py</button>
<button class="primary-button" id="downloadPyButton">Download .py</button>
<button class="primary-button" id="downloadTxtButton">Download .txt</button>
<button class="primary-button" id="openNewTabButton" style="display: none;">Open in New Tab</button>
<button class="primary-button" id="makePuzzleButton" style="display: none;">Make Puzzle</button>
</div>
</div>
<section class="panel editor-panel">
<div class="toggle-row">
<span id="detectionLabel" hidden>Detection: waiting for code.</span>
<div class="button-row editor-run-controls" id="teacherControlsRow">
<button class="run-button" id="runButton">Run</button>
<button class="quiz-button" id="quizButton" style="display: none;">Run Tests</button>
<button class="quiz-button" id="creativeNextButton"
style="display: none; background: #8b5cf6 !important;">Next Level ➔</button>
<button class="quiz-button" id="creativeEndButton"
style="display: none; background: #8b5cf6 !important;">Complete Course 🎓</button>
<button class="stop-button" onclick="clearRunner()">Reset</button>
</div>
<div class="editor-action-row" aria-label="Editor actions">
<button type="button" class="editor-action-button" id="undoEditorButton" title="Undo last edit">Undo</button>
<button type="button" class="editor-action-button" id="redoEditorButton" title="Redo last edit">Redo</button>
<button type="button" class="editor-action-button" id="revertEditorButton"
title="Revert to the last loaded or downloaded file">Revert</button>
<button type="button" class="editor-action-button" id="playbackButton" title="Play back editing history">⏱️
Playback</button>
<span id="pasteCounter" class="paste-counter" title="Paste/upload count">0</span>
</div>
</div>
<!-- Playback Controls Bar -->
<div id="playbackControlsBar" class="playback-controls-bar"
style="display: none; flex-direction: column; gap: 10px;">
<!-- Row 1: Full-width Timeline Slider -->
<div class="playback-timeline-row" style="width: 100%;">
<div class="playback-timeline-container" id="playbackTimelineContainer" style="width: 100%;">
<div class="playback-timeline-track" id="playbackTimelineTrack">
<div id="playbackMarkersContainer" class="playback-markers-container"></div>
<input type="range" id="playbackTimeline" min="0" max="0" value="0">
</div>
</div>
</div>
<!-- Row 2: Controls, revisions label and actions -->
<div class="playback-controls-row"
style="display: flex; align-items: center; justify-content: space-between; gap: 16px; width: 100%; flex-wrap: wrap;">
<div style="display: flex; align-items: center; gap: 12px; flex-wrap: wrap;">
<!-- Playback buttons -->
<div class="playback-btn-group">
<button type="button" class="playback-control-btn" id="pbFirst" title="Previous checkpoint">⏮️</button>
<button type="button" class="playback-control-btn" id="pbPrev" title="Previous character">◀</button>
<button type="button" class="playback-control-btn" id="pbPlay" title="Auto Play">⏯️ Play</button>
<button type="button" class="playback-control-btn" id="pbNext" title="Next character">▶</button>
<button type="button" class="playback-control-btn" id="pbLast" title="Next checkpoint">⏭️</button>
</div>
</div>
<!-- Revisions label -->
<span id="playbackStatusLabel" class="playback-status-label"
style="flex-grow: 1; text-align: center; font-size: 13px; font-weight: 600; padding: 0 10px;">No
history</span>
<!-- Action buttons -->
<div class="playback-action-group">
<button type="button" class="playback-action-btn restore" id="pbRestore"
title="Restore this revision to editor">Restore</button>
<button type="button" class="playback-action-btn close" id="pbClose"
title="Exit playback mode">Close</button>
</div>
</div>
</div>
<!-- Blockly Workspace Area -->
<div id="blocklyArea"
style="display: none; height: 350px; position: relative; border: 1px solid #cbd5e1; border-radius: 8px; overflow: hidden; margin-bottom: 0;">
<div id="blocklyDiv" style="position: absolute; top: 0; left: 0; right: 0; bottom: 0;"></div>
<!-- Floating Run Button within blocks area -->
<button id="blocklyRunButton"
style="position: absolute; top: 10px; right: 50px; z-index: 100; background: #10b981; color: white; border: none; padding: 8px 16px; border-radius: 20px; font-weight: bold; cursor: pointer; display: flex; align-items: center; gap: 6px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);"
title="Run Code">
Run 🚩
</button>
</div>
<!-- Split Resizer -->
<div id="editorSplitResizer"
style="display: none; height: 10px; background: #f1f5f9; cursor: ns-resize; border-top: 1px solid #cbd5e1; border-bottom: 1px solid #cbd5e1; align-items: center; justify-content: center; user-select: none;">
<div style="width: 30px; height: 4px; border-radius: 2px; background: #cbd5e1;"></div>
</div>
<div class="editor-shell" style="position: relative; background: #ffffff;" id="editorBg">
<div class="line-numbers" id="lineNumbers">1</div>
<div id="highlightLayer"
style="position: absolute; top: 14px; left: 64px; right: 0; bottom: 0; pointer-events: none; overflow: hidden; z-index: 5;">
</div>
<textarea id="editor" spellcheck="false"></textarea>
<pre id="displayEditor"><code id="displayCode" class="language-python"></code></pre>
</div>
</section>
<div class="runner-toggle" id="runnerToggle" title="Drag left or right to resize the panes">⋮</div>
<div class="runner-layout" id="runnerLayout">
<section class="panel runner-panel">
<div id="blocksCodePreview" class="blocks-code-preview" style="display: none;">
<div class="blocks-code-preview-header">
<span>Generated Python</span>
<div class="blocks-preview-theme-toggle" aria-label="Generated Python colors">
<label><input type="radio" id="blocksPreviewTextColors" name="blocksPreviewColors" value="text" checked>
Text</label>
<label><input type="radio" id="blocksPreviewBlockColors" name="blocksPreviewColors" value="blocks">
Blocks</label>
</div>
<button id="copyBlocksCodeButton" type="button">Copy</button>
</div>
<pre id="blocksCodePreviewText"><code id="blocksCodePreviewCode" class="language-python"></code></pre>
</div>
<p class="message" id="runnerMessage"></p>
<div class="button-row" id="teachControlsRow" style="display: none;">
<button class="run-button" id="playPauseButton" style="min-width: 80px;">Play</button>
<button class="primary-button" id="stepBackButton">◀ Back</button>
<button class="primary-button" id="stepButton">Step ▶</button>
<button class="stop-button" id="resetButton">Reset</button>
</div>
<!-- Turtle Canvas Panel -->
<div id="turtleCanvasContainer"
style="display: none; background: #ffffff; border: 1px solid #cbd5e1; border-radius: 8px; margin-bottom: 12px; overflow: hidden; flex-direction: column; flex-shrink: 0;">
<div
style="background: #f1f5f9; padding: 8px 12px; border-bottom: 1px solid #cbd5e1; display: flex; justify-content: space-between; align-items: center; font-size: 14px; font-weight: 600; color: #1e293b;"
id="turtleHeader">
<span>🐢 Turtle Graphics</span>
<button onclick="downloadCanvasImage()" class="primary-button"
style="padding: 4px 8px; font-size: 12px; background: #2563eb;">Save Image</button>
</div>
<div style="padding: 12px; display: flex; justify-content: center; background: #f8fafc;"
id="turtleCanvasWrapper">
<canvas id="turtleCanvas" width="400" height="400"
style="border: 1px solid #e2e8f0; background: #ffffff; box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1); max-width: 100%; height: auto; aspect-ratio: 1;"></canvas>
</div>
</div>
<div id="displayDebuggerPanel" style="display: none;">
<!-- Tab Headers -->
<div class="display-tab-headers"
style="display: flex; gap: 4px; margin-bottom: 12px; border-radius: 8px; padding: 4px;">
<button id="tabBtnState" class="display-tab-btn active" onclick="switchDisplayTab('state')" type="button">
Variables & Call Stack
</button>
<button id="tabBtnTraceTable" class="display-tab-btn" onclick="switchDisplayTab('tracetable')"
type="button">
Trace Table
</button>
</div>
<!-- Tab Content 1: State Tracker (Call Trace & Variables) -->
<div id="tabContentState">
<div id="callTracePanel"
style="background: #e2e8f0; border-radius: 8px; padding: 10px; margin-bottom: 12px; border: 1px solid #cbd5e1;">
<h4 style="margin: 0 0 8px; font-size: 14px; color: #1e293b;">Call Trace</h4>
<div id="callTraceList"
style="font-family: Consolas, Monaco, monospace; font-size: 13px; color: #334155; white-space: pre-wrap; overflow-wrap: anywhere; max-height: 170px; overflow-y: auto;">
</div>
</div>
<div id="variablePanel"
style="background: #e2e8f0; border-radius: 8px; padding: 10px; margin-bottom: 12px; border: 1px solid #cbd5e1;">
<h4 style="margin: 0 0 8px; font-size: 14px; color: #1e293b;">Variables</h4>
<div id="variableList"
style="font-family: Consolas, Monaco, monospace; font-size: 13px; color: #334155; white-space: pre-wrap; overflow-wrap: anywhere; max-height: 150px; overflow-y: auto;">
</div>
</div>
</div>
<!-- Tab Content 2: Trace Table -->
<div id="tabContentTraceTable" style="display: none;">
<div id="traceTablePanel"
style="background: #e2e8f0; border-radius: 8px; padding: 10px; margin-bottom: 12px; border: 1px solid #cbd5e1;">
<div style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px;">
<h4 style="margin: 0; font-size: 14px; color: #1e293b;">Trace Table</h4>
<div style="display: flex; align-items: center; gap: 8px;">
<button id="copyTraceTableBtn" onclick="copyTraceTableToClipboard()" class="primary-button"
style="padding: 4px 8px; font-size: 11px; background: #8b5cf6; margin: 0; border-radius: 4px; font-weight: 600;">
Copy Table
</button>
</div>
</div>
<div id="traceTableContainer"
style="overflow-x: auto; max-height: 250px; border: 1px solid #cbd5e1; border-radius: 6px; background: #ffffff;">
</div>
</div>
</div>
</div>
<!-- Reference Links Panel -->
<div id="linksPanel" class="links-panel" style="display: none;">
<h4>
<span style="display: inline-flex; align-items: center; gap: 6px;">🔗 Reference Links</span>
<button id="toggleGlobalPreviewBtn"
style="padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 600; cursor: pointer; border: none; transition: all 0.2s; background: #ef4444; color: white;">Preview:
Off</button>
</h4>
<div id="linksList" class="links-list">
<!-- Links populated dynamically -->
</div>
<!-- Web Preview Frame Area -->
<div id="webPreviewContainer" class="preview-container">
<div
style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; gap: 8px;">
<span id="previewUrlTitle" class="preview-url-title"></span>
<div style="display: flex; gap: 6px; flex-shrink: 0;">
<button id="openNewTabFromPreview" class="link-item-btn-open" style="padding: 4px 8px;">Open
External</button>
</div>
</div>
<div class="preview-iframe-wrapper">
<iframe id="webPreviewIframe" style="width: 100%; height: 100%; border: none;"
sandbox="allow-scripts allow-same-origin allow-popups allow-forms"></iframe>
<div class="preview-iframe-footer">
🛡️ If the page above appears blank, the website blocks nesting.
<a id="iframeFallbackLink" href="#" target="_blank"
style="color: var(--primary-color); font-weight: 600; text-decoration: underline;">Open in new tab</a>
</div>
</div>
</div>
</div>
</section>
</div>
<div class="terminal-resizer" id="terminalResizer"
title="Click to open or close the terminal; drag up or down to resize it">
<span class="terminal-toggle-icon" aria-hidden="true">▲</span>
<div></div>
<span class="terminal-toggle-icon" aria-hidden="true">▲</span>
</div>
<section class="panel output-panel" aria-label="Program output">
<div class="console-input-panel" id="consoleInputPanel">
<p class="console-input-help" id="consoleInputHelp">This program is waiting for input.</p>
<div class="console-input-row">
<input type="text" id="consoleInputField" placeholder="Type a value and press Enter">
<button class="console-submit-button" id="consoleSubmitButton">Submit</button>
</div>
</div>
<div class="status" id="runnerStatus">Ready.</div>
<div id="output"></div>
</section>
</div>
<script src="https://cdn.jsdelivr.net/pyodide/v0.25.0/full/pyodide.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/prism.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/components/prism-python.min.js"></script>
<!-- Blockly library -->
<script src="https://unpkg.com/blockly/blockly_compressed.js"></script>
<script src="https://unpkg.com/blockly/blocks_compressed.js"></script>
<script src="https://unpkg.com/blockly/python_compressed.js"></script>
<script src="https://unpkg.com/blockly/msg/en.js"></script>
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