JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
  width: 100px;
  height: 100px;
  background: 
    radial-gradient(#fff 0, #fff 30px, transparent 31px, transparent 40px, #fff 41px),
    linear-gradient(-45deg, green, lightgreen);
}