<html>
<head>
<meta charset="utf-8">
<title>实例
</title>
</head>
<body>
<style type="text/css">.demo_box{
border:1px solid #3DA5DC;
background:#a4dcf9;
height:100px;
width:200px;
text-align:center;
color:#fff;
}
.demo_box{
animation:f1 2s 0.5s 10 forwards linear;
animation:f1 2s 0.5s 10 forwards linear;
position:relative;
left:10px;
width:100px;