JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
  background: url(https://cms.qz.com/wp-content/uploads/2018/12/unicorn-alarmed-e1546026509637.jpg?quality=75&strip=all&w=1400) center center;
  background-size: cover;
	background-repeat:no-repeat;
	background-color:#ccc;
  	float:left;
  height: 80vw;
  width: 80vw;
	margin:0 0.25em 0 0;
  clip-path:polygon(15% 15%,85% 15%,85% 85%, 15% 85%);
}