老师看下2-18的编程练习

来源：2-18 编程练习

鱼传奇

2022-03-05 23:12:03

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>2-9</title>
    <style type="text/css">
        div {
            font-family: Arial;
            font-size: 72px;
            font-weight: bold;
            position: fixed;
            right: 0;
            left: 0;
            width: 30px;
            height: 30px;
            margin: auto;
            transform: rotate(90deg);
            animation: arrowMove .5s linear 0.5s infinite;
        }
        @keyframes arrowMove {
            /*from {*/
            /*    bottom: 20px;*/
            /*}*/
            /*to {*/
            /*    bottom: 40px;*/
            /*}*/
            0% { bottom: 40px; }
            20% { bottom: 10px; }
            40% { bottom: 20px; }
            100% { bottom: 40px; }
        }
    </style>
</head>
<body>
    <div>&gt;</div>
</body>
</html>

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