CSS3-Animation-Effect/style.css at master · hanumancode/CSS3-Animation-Effect · GitHub

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body {
    margin: 0;
    padding: 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000;
}

.container {
    position: relative;
    width: 800px;
    height: 800px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container span {
    position: absolute;
    animation: animate 10s linear infinite reverse;
    border-radius: 50%;
}

.container span:nth-child(1) {
    animation-delay: 0s;
}
.container span:nth-child(2) {
    animation-delay: 1s;
}
.container span:nth-child(3) {
    animation-delay: 2s;
}
.container span:nth-child(4) {
    animation-delay: 3s;
}
.container span:nth-child(5) {
    animation-delay: 4s;
}
.container span:nth-child(6) {
    animation-delay: 5s;
}
.container span:nth-child(7) {
    animation-delay: 6s;
}
.container span:nth-child(8) {
    animation-delay: 7s;
}
.container span:nth-child(9) {
    animation-delay: 8s;
}
.container span:nth-child(10) {
    animation-delay: 9s;
}

@keyframes animate {
    0% {
        width: 0;
        height: 0;
        opacity: 1;
        box-shadow: inset 0 0 10px rgba(255, 255, 1, 0.5);
    }

    100% {
        width: 100%;
        height: 100%;
        opacity: 0;
        box-shadow: inset 0 0 40px rgb(255, 255, 1, 1.0);
    }
}