JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
        </div>

CSS

.main {
        height:400px;
          width:400px;
        background-image: url('http://collider.com/wp-content/uploads/pokemon-pikachu.jpg');
    }
    
    .main:hover {
        background-image: url('http://imgs.tuts.dragoart.com/how-to-draw-pokemon_1_000000011348_5.jpg');
    }