JSFiddle - React, Tailwind, and code Playground

HTML

<div class="block"></div>

CSS

.block {
  background: url('http://www.rosslaresecurity.com/wp-content/uploads/2014/02/twitter-icon-300x300.png');
  width: 50px; height: 50px;
  transition: all 0.3s;
}

.block:hover {
  background: url('http://www.rosslaresecurity.com/wp-content/uploads/2014/02/twitter-icon-300x300.png') 0 50px;
}