JSFiddle - React, Tailwind, and code Playground

HTML

<div class="avatar"></div>

CSS

.avatar{
    padding: 0;
    height: 96px;
    width: 72px;
    position: relative;
    z-index: 10;
    left:142px;
    top:77px;
    background:url('http://www.stroimdom.com.ua/forum/customavatars/avatar180_3.gif') no-repeat;   
}
.avatar:after{
    position: absolute;
    z-index: 15;
    display: none;
    content: '';
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:url('http://ip2me.ru/test4/blik.png') no-repeat center center;
}
.avatar:hover:after{
    display: block;
}