JavaScript 实现兔子旋转动画示例

```
.box{
    width: 100px;
    height: 100px;
    background: red;
    //要素一：动画名称
    animation-name: test;
    //要素三：动画时间
    animation-duration: 3s;
}
//要素二：动画定义
@keyframes test {
    from{
        width: 100px;
        height: 100px;
    }to{
        width: 300px;
        height: 300px;
    }
}
```

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    *{
      margin: 0;
      padding: 0;
    }
    .box{
      width: 200px;
      height: 200px;
      background-image: url(./imgs/1.png);
      background-repeat: no-repeat;
      background-size: cover;
      position: absolute;
      animation: tuzi 4s;
    }
    @keyframes tuzi {
      0%{
        left: 0;
        top: 0;
      }25%{
        left: 300px;
        top: 0;
      }50%{
        left: 300px;
        top: 200px;
      }75%{
        left: 0;
        top: 200px;
      }100%{
        left: 0;
        top: 0;
      }
    }
  </style>
</head>
<body> 
  <div class="box">
  </div>
  <script>
  </script>
</body>
</html>