JSFiddle - React, Tailwind, and code Playground

HTML

<div id="panel"><a id="close" href="#"></a>Some content goes here. blah blah blah</div>

CSS

#panel{
    width:100px;
    height:100px;
    background:white;
    border:2px solid black;
}
#close{
    display:block;
    float:right;
    width:30px;
    height:29px;
    background:url(http://www.htmlgoodies.com/img/registrationwelcome/close_icon.png) no-repeat center center;
}