老师好，请检查2-18代码，谢谢

来源：2-18 编程练习

慕桂英1122475

2023-03-06 19:44:02

<!DOCTYPE html>
<html lang="en">
  <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) scale(0.5);

        animation: tobottom 0.5s linear 0.5s infinite;
      }
      @keyframes tobottom {
        from {
          bottom: 20px;
        }
        to {
          bottom: 0px;
        }
      }
    </style>
  </head>
  <body>
    <div>&gt;</div>
  </body>
</html>

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