Css实现一个简单的幻灯片效果页面

/**HTML**/
 div.ani
 /**css**/
 .ani{
 width:480px;
 height:320px;
 margin:50px auto;
 overflow: hidden;
 box-shadow:0 0 5px rgba(0,0,0,1);
 background-size: cover;
 background-position: center;
 -webkit-animation-name: "loops";
 -webkit-animation-duration: 20s;
 -webkit-animation-iteration-count: infinite;
 }
 @-webkit-keyframes "loops" {
 0% {
 background:url(http://d.hiphotos.baidu.com/image/w%3D400/sign=c01e6adca964034f0fcdc3069fc27980/e824b899a9014c08e5e38ca4087b02087af4f4d3.jpg) no-repeat; 
 }
 25% {
 background:url(http://b.hiphotos.baidu.com/image/w%3D400/sign=edee1572e9f81a4c2632edc9e72b6029/30adcbef76094b364d72bceba1cc7cd98c109dd0.jpg) no-repeat;
 }
 50% {
 background:url(http://b.hiphotos.baidu.com/image/w%3D400/sign=937dace2552c11dfded1be2353266255/d8f9d72a6059252d258e7605369b033b5bb5b912.jpg) no-repeat;
 }
 75% {
 background:url(http://g.hiphotos.baidu.com/image/w%3D400/sign=7d37500b8544ebf86d71653fe9f9d736/0df431adcbef76095d61f0972cdda3cc7cd99e4b.jpg) no-repeat;
 }
 100% {
 background:url(http://c.hiphotos.baidu.com/image/w%3D400/sign=cfb239ceb0fb43161a1f7b7a10a54642/3b87e950352ac65ce2e73f76f9f2b21192138ad1.jpg) no-repeat;
 }
 }