css3实现动画效果

示例：

doctype html>
<html>
<head>
<meta charset="utf-8">
<title>css3动画title>
<style>
.div1 {
    position:relative;
    width:500px;
    height:200px;
    background-color:black;
    animation:mydh 10s infinite;
    -webkit-animation:mydh 10s infinite;
}

@keyframes mydh {
    0% {background:red;left:0px;top:0;}
    50% {background:blue;left:100px;top:200px;}
    100% {background:red;left:0px;top:0;}
}

@-webkit-keyframes mydh {
    0% {background:red;left:0px;top:0;}
    50% {background:blue;left:100px;top:200px;}
    100% {background:red;left:200px;top:0;}    
}
style>
head>

<body>
<div class="div1">div>
body>
html>
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