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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
< html >
   < head >
     < title >cycle</ title >
     
     < meta  http-equiv = "keywords"  content = "keyword1,keyword2,keyword3" >
     < meta  http-equiv = "description"  content = "this is my page" >
     < meta  http-equiv = "content-type"  content = "text/html; charset=UTF-8" >
     
 
     < style >
         #cycle{
             position: relative;
             width:200px;
             height:200px;
             margin:auto;
 
         }
         .pie1-wrapper{
             position: absolute;
             width:200px;
             height:200px;
             clip:rect(0px 200px 200px 100px);
             
         }
 
         @-webkit-keyframes pie1-rotate /* Safari 和 Chrome */
         {
             from {
                 transform:rotate(0deg);
                 -webkit-transform: rotate(0deg);
             }
             to {
                 transform:rotate(180deg);
                 -webkit-transform: rotate(180deg);
             }
         }
 
 
         .pie1{
             position: absolute;
             width:200px;
             height:200px;
             background-color:pink;
             border-radius: 100px;
             clip:rect(0px 100px 200px 0px);
 
             -webkit-animation: pie1-rotate 2s;    /* Safari 和 Chrome */
             -webkit-animation-fill-mode: forwards;
             -webkit-animation-timing-function:linear; /* Safari 和 Chrome */
 
         }
 
         .pie2-wrapper{
             position: absolute;
             width:200px;
             height:200px;
             clip:rect(0px 100px 200px 0px);
             
         }
 
         @-webkit-keyframes pie2-rotate /* Safari 和 Chrome */
         {
             from {
                 transform:rotate(0deg);
                 -webkit-transform: rotate(0deg);
             }
             to {
                 transform:rotate(180deg);
                 -webkit-transform: rotate(180deg);
             }
         }
 
         .pie2{
             position: absolute;
             width:200px;
             height:200px;
             background-color:pink;
             border-radius: 100px;
             clip:rect(0px 200px 200px 100px);
             -webkit-animation: pie2-rotate 2s;   
             -webkit-animation-fill-mode: forwards;
             -webkit-animation-delay:2s; 
             -webkit-animation-timing-function:linear; /* Safari 和 Chrome */
 
         }
 
 
         .pie-grey{
             width:200px;
             height:200px;
             background-color:#eaeaea;
             border-radius: 100px;
         }
 
         .pie-white{
             position: absolute;
             top:0;
             bottom:0;
             left:0;
             right:0;
             width:180px;
             height:180px;
             background-color:#fff;
             border-radius: 90px;
             margin:auto;
         }
     </ style >
   </ head >
   
   < body >
     
 
       < div  id = "cycle" >
           < div  class = "pie1-wrapper" >
               < div  class = "pie1" ></ div >
         </ div >
 
 
         < div  class = "pie2-wrapper" >
               < div  class = "pie2" ></ div >
         </ div >
 
           < div  class = "pie-grey" ></ div >
 
           < div  class = "pie-white" ></ div >
       </ div >
 
 
   </ body >
</ html >