JSFiddle - React, Tailwind, and code Playground

HTML

<div class="headerImageWrapper">

<img src="http://graphicsheat.com/wp-content/uploads/2013/07/10851_running-cute-puppies.pg-small.jpg" class="headerImage image1">

<img src="http://graphicsheat.com/wp-content/uploads/2013/07/10851_running-cute-puppies.pg-small.jpg" class="headerImage image2">

<img src="http://graphicsheat.com/wp-content/uploads/2013/07/10851_running-cute-puppies.pg-small.jpg" class="headerImage image4">

<img src="http://graphicsheat.com/wp-content/uploads/2013/07/10851_running-cute-puppies.pg-small.jpg" class="headerImage image3">

</div>

CSS

.headerImage {
    height: 70px;
    width: 120px;
}
.image1:hover {
    content: url('http://www.furrytalk.com/wp-content/uploads/2010/05/2.jpg');
}
.image2:hover {
    content: url('http://www.furrytalk.com/wp-content/uploads/2010/05/2.jpg');
}
.image3:hover {
    content: url('http://www.furrytalk.com/wp-content/uploads/2010/05/2.jpg');
}
.image4:hover {
    content: url('http://www.furrytalk.com/wp-content/uploads/2010/05/2.jpg');
}