JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

div {
  position: relative;
  width: 150px;
  height: 150px;
  margin: 100px auto 0;
  border: 12px solid;
  background: #000;
  border-radius: 100%;
  box-shadow: 0 0 0 12px #0f0 inset;
}

div:before, div:after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 100%;
  box-shadow: 0 0 0 12px #0f0 inset;
}

div:before {
	width: 100px;
	height: 100px;
	margin: -50px;
}

div:after {
	width: 50px;
	height: 50px;
	margin: -25px;
}