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源代碼:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>Wfuyu教程(wfuyu.com)</title>
<style> 
div
{
	width:100px;
	height:100px;
	background:red;
	position:relative;
	animation-name:myfirst;
	animation-duration:5s;
	animation-timing-function:linear;
	animation-delay:2s;
	animation-iteration-count:infinite;
	animation-direction:alternate;
	animation-play-state:running;
	/* Safari and Chrome: */
	-webkit-animation-name:myfirst;
	-webkit-animation-duration:5s;
	-webkit-animation-timing-function:linear;
	-webkit-animation-delay:2s;
	-webkit-animation-iteration-count:infinite;
	-webkit-animation-direction:alternate;
	-webkit-animation-play-state:running;
}

@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 and 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><b>注意:</b> 該實例在 Internet Explorer 9 及更早 IE 版本是無效的。</p>

</body>
</html>

運行結果：

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