play pony

HTML

<div class="player-thumbnail">
<img src="http://d.pr/i/xysf+"/>
    <img src="http://d.pr/i/saiz+"/>
    
</div>

CSS

.player-thumbnail {
    position:relative;
    cursor: pointer;
}

.player-thumbnail img{
    position:absolute;
    z-index:1;
}


.player-thumbnail img:last-child{
    position:absolute;
    z-index:0;
}

.player-thumbnail:hover img:last-child{   
    z-index:2;
}