编程狮在线代码实例

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>W3Cschool教程(w3cschool.cn)</title> 
<style> 
div
{
  width:100px;
  height:100px;
  background:red;
  position:relative;
  animation:myfirst 5s infinite;
  animation-direction:alternate;
​
  /* Safari 和 Chrome */
  -webkit-animation:myfirst 5s infinite;
  -webkit-animation-direction:alternate;
}
​
@keyframes myfirst
{
  0%   {background:red; left:0px; top:0px;}
  25%  {background:yellow; left:200px; top:0px;}
  50%  {background:blue; left:200px; top:200px;}
  75%  {background:green; left:0px; top:200px;}
  100% {background:red; left:0px; top:0px;}
}
​
@-webkit-keyframes myfirst /* Safari 和 Chrome */
{
  0%   {background:red; left:0px; top:0px;}
  25%  {background:yellow; left:200px; top:0px;}
  50%  {background:blue; left:200px; top:200px;}
  75%  {background:green; left:0px; top:200px;}
  100% {background:red; left:0px; top:0px;}
}
</style>
</head>
<body>
​
<p><strong>注意：</strong>Internet Explorer 9 及其之前的版本不支持 animation-direction 属性。</p>
​
<div></div>
​
</body>
</html>
实例代码
运行结果