纯CSS3的图片slider

<div class="container">
  <img class='photo'  src="http://farm9.staticflickr.com/8320/8035372009_7075c719d9.jpg" alt="" />
  <img class='photo'  src="http://farm9.staticflickr.com/8517/8562729616_35b1384aa1.jpg" alt="" />
  <img class='photo'  src="http://farm9.staticflickr.com/8465/8113424031_72048dd887.jpg" alt="" />
  <img class='photo'  src="http://farm9.staticflickr.com/8241/8562523343_9bb49b7b7b.jpg" alt="" />

</div>

<style>
body{background:#000;}
.container{
  margin:50px auto;
  width:500px;
  height:300px;
  overflow:hidden;
  border:10px solid;
  border-top-color:#856036;
  border-left-color:#5d4426;
  border-bottom-color:#856036;
  border-right-color:#5d4426;
  position:relative;

}
.photo{
  position:absolute;
  animation:round 16s infinite;
  opacity:0;
  
}
@keyframes round{   
  15%{opacity:1;}
 25%{opacity:1;}
  40%{opacity:0;}
} 
.container:hover .photo{
  animation-play-state:paused;
}

img:nth-child(1){animation-delay:0s;}
img:nth-child(2){animation-delay:4s;}
img:nth-child(3){animation-delay:8s;}
img:nth-child(4){animation-delay:12s;}

</style>