2-18练习题

来源：2-18 编程练习

海波_

2021-05-30 19:00:39

<!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);
            /*此处写代码*/
            animation: div 1.2s linear 0s infinite;
        }

        @keyframes div {
            0% {
                bottom: 40px;
            }

            50% {
                bottom: 20px;

            }

            75% {
                bottom: 25px;

            }

            100% {
                bottom: 20px;

            }

        }
    </style>
</head>

<body>
    <div>&gt;</div>
</body>

</html>