CSS3三角形不断放大特效

DOCTYPE html>
html lang="en">
head>
    meta charset="UTF-8">
    title>CSS3三角形不断放大特效title>
    link rel="stylesheet" href="css/style.css">
head>
style>
    html {
        height: 100%;
    }

    body {
        padding: 0;
        margin: 0;
        height: 100%;
        background: #642B73;
        /* fallback for old browsers */
        /* Chrome 10-25, Safari 5.1-6 */
        background: linear-gradient(to left, #C6426E, #642B73);
        /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
    }

    .wrapper {
        overflow: hidden;
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
    }

    .triangle-canvas {
        position: absolute;
        left: 50%;
        top: 50%;
        width: 100%;
        height: 100%;
        -webkit-transform: translate(-50%, -50%);
        transform: translate(-50%, -50%);
    }

    .triangle {
        fill: none;
        stroke: #fff;
        stroke-width: 15;
        -webkit-transform-origin: center center;
        transform-origin: center center;
        -webkit-animation: triangle-animation 10s linear infinite;
        animation: triangle-animation 10s linear infinite;
    }

    .triangle-1 {
        -webkit-animation-delay: 0s;
        animation-delay: 0s;
    }

    .triangle-2 {
        -webkit-animation-delay: -0.5s;
        animation-delay: -0.5s;
    }

    .triangle-3 {
        -webkit-animation-delay: -1s;
        animation-delay: -1s;
    }

    .triangle-4 {
        -webkit-animation-delay: -1.5s;
        animation-delay: -1.5s;
    }

    .triangle-5 {
        -webkit-animation-delay: -2s;
        animation-delay: -2s;
    }

    .triangle-6 {
        -webkit-animation-delay: -2.5s;
        animation-delay: -2.5s;
    }

    .triangle-7 {
        -webkit-animation-delay: -3s;
        animation-delay: -3s;
    }

    .triangle-8 {
        -webkit-animation-delay: -3.5s;
        animation-delay: -3.5s;
    }

    .triangle-9 {
        -webkit-animation-delay: -4s;
        animation-delay: -4s;
    }

    .triangle-10 {
        -webkit-animation-delay: -4.5s;
        animation-delay: -4.5s;
    }

    .triangle-11 {
        -webkit-animation-delay: -5s;
        animation-delay: -5s;
    }

    .triangle-12 {
        -webkit-animation-delay: -5.5s;
        animation-delay: -5.5s;
    }

    .triangle-13 {
        -webkit-animation-delay: -6s;
        animation-delay: -6s;
    }

    .triangle-14 {
        -webkit-animation-delay: -6.5s;
        animation-delay: -6.5s;
    }

    .triangle-15 {
        -webkit-animation-delay: -7s;
        animation-delay: -7s;
    }

    .triangle-16 {
        -webkit-animation-delay: -7.5s;
        animation-delay: -7.5s;
    }

    .triangle-17 {
        -webkit-animation-delay: -8s;
        animation-delay: -8s;
    }

    .triangle-18 {
        -webkit-animation-delay: -8.5s;
        animation-delay: -8.5s;
    }

    .triangle-19 {
        -webkit-animation-delay: -9s;
        animation-delay: -9s;
    }

    .triangle-20 {
        -webkit-animation-delay: -9.5s;
        animation-delay: -9.5s;
    }

    @-webkit-keyframes triangle-animation {
        0% {
            -webkit-transform: scale(0) rotate(0deg);
            transform: scale(0) rotate(0deg);
            opacity: 1;
        }

        100% {
            -webkit-transform: scale(3) rotate(45deg);
            transform: scale(3) rotate(45deg);
            opacity: 0;
        }
    }

    @keyframes triangle-animation {
        0% {
            -webkit-transform: scale(0) rotate(0deg);
            transform: scale(0) rotate(0deg);
            opacity: 1;
        }

        100% {
            -webkit-transform: scale(3) rotate(45deg);
            transform: scale(3) rotate(45deg);
            opacity: 0;
        }
    }
style>
body>
div class="wrapper">
    svg class="triangle-canvas" viewBox="0 0 1000 1000" xmlns="http://www.w3.org/2000/svg">
        polygon class="triangle triangle-1" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-2" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-3" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-4" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-5" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-6" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-7" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-8" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-9" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-10" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-11" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-12" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-13" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-14" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-15" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-16" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-17" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-18" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-19" points="500,200 759,650 241,650" />
        polygon class="triangle triangle-20" points="500,200 759,650 241,650" />
    svg>
div>
body>
html>