一个简单有趣的css动画

<html lang="en">  <head>    <meta charset="UTF-8" />    <meta name="viewport" content="width=device-width, initial-scale=1.0" />    <meta http-equiv="X-UA-Compatible" content="ie=edge" />    <title>3D旋转木马效果</title>    <style type="text/css">      * {        margin: 0px;        padding: 0px;      }      #box {        width: 200px;        height: 300px;        animation: rotate 20s linear infinite;        position: fixed;        top: 0;        left: 0;        right: 0;        bottom: 0;        margin: auto auto;        transform-style: preserve-3d;      }      img {        width: 100%;        position: absolute;      }      img:nth-child(1) {        transform: rotateY(0) translateZ(600px);      }      img:nth-child(2) {        transform: rotateY(36deg) translateZ(600px);      }      img:nth-child(3) {        transform: rotateY(72deg) translateZ(600px);      }      img:nth-child(4) {        transform: rotateY(108deg) translateZ(600px);      }      img:nth-child(5) {        transform: rotateY(144deg) translateZ(600px);      }      img:nth-child(6) {        transform: rotateY(180deg) translateZ(600px);      }      img:nth-child(7) {        transform: rotateY(216deg) translateZ(600px);      }      img:nth-child(8) {        transform: rotateY(252deg) translateZ(600px);      }      img:nth-child(9) {        transform: rotateY(288deg) translateZ(600px);      }      img:nth-child(10) {        transform: rotateY(324deg) translateZ(600px);      }      @keyframes rotate {        0% {          transform: rotateX(0) rotateY(0);        }        25% {          transform: rotateX(20deg) rotateY(180deg);        }        50% {          transform: rotateX(0) rotateY(360deg);        }        75% {          transform: rotateX(-20deg) rotateY(540deg);        }        100% {          transform: rotateX(0) rotateY(720deg);        }      }    </style>  </head>  <body>    <div id="box">      <ul>        <img src="images/img1.jpg" alt="" />        <img src="images/img2.jpg" alt="" />        <img src="images/img3.jpeg" alt="" />        <img src="images/img4.jpeg" alt="" />        <img src="images/img5.jpg" alt="" />        <img src="images/img6.jpeg" alt="" />        <img src="images/img7.jpeg" alt="" />        <img src="images/img8.jpeg" alt="" />        <img src="images/img1.jpg" alt="" />        <img src="images/img2.jpg" alt="" />      </ul>    </div>  </body></html>