css动态图（作业）

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>loading动画</title>
    <style type="text/css">
        .box{
            width: 300px;
            height: 135px;
            border: 2px solid #000;
            margin: 200px auto 0;
        }
        .box p{
            text-align: center;
            width: 100%;

        }
        .box div{
            width: 30px;
            height: 70px;
            float: left;
            background-color: gold;
            margin: 15px;
            border-radius: 10px;
        }
        .box div:nth-child(1){
            background-color: red;
            animation: loading 0.5s ease 0s infinite alternate;
        }
        .box div:nth-child(2){
            background-color: green;
            animation: loading 0.5s ease 0.1s infinite alternate;
        }
        .box div:nth-child(3){
            background-color: pink;
            animation: loading 0.5s ease 0.2s infinite alternate;
        }
        .box div:nth-child(4){
            background-color: greenyellow;
            animation: loading 0.5s ease 0.3s infinite alternate;
        }
        .box div:nth-child(5){
            background-color: cyan;
            animation: loading 0.5s ease 0.4s infinite alternate;
        }
        @keyframes loading{
            from{
                transform: scaleY(1);
            }
            to{
                transform: scaleY(0.5);
            }
        }
    </style>
</head>
<body>
    <div class="box">
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <div></div>
        <p>loading...</p>
    </div>
</body>
</html>
css动态图（作业）

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