<!DOCTYPE HTML>
<html>
<style>
div.gp-container{
position:relative;
}
div.gp-container span{
position:absolute;
}
div.gp-container span img{
height:25px;
width:25px;
border-radius:20px;
}
</style>
<body>
<div class="gp-container">
<span >
<img src="http://img2.imgtn.bdimg.com/it/u=3267643733,1769010289&fm=26&gp=0.jpg" >
</span>
<span style="left:20px;">
<img src="http://img2.imgtn.bdimg.com/it/u=3267643733,1769010289&fm=26&gp=0.jpg" >
</span>
<span style="left:40px;">
<img src="http://img2.imgtn.bdimg.com/it/u=3267643733,1769010289&fm=26&gp=0.jpg" >
</span>
</div>
</body>
</html>