JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
    <div id="content"></div>
</div>

CSS

#content{
  background:url(http://a.dryicons.com/files/graphics_previews/so_70s_background.jpg) top left repeat;
  width:600px;
  height:600px;
  position:absolute;
  opacity:0.6;
  filter:alpha(opacity=60);
}

.box{
  background-color: black;
  width:500px;
  height:500px;
  position:absolute;
  overflow:hidden;
  border-radius: 20%;
}