JSFiddle - React, Tailwind, and code Playground

by Pavel Levashov

HTML

<head>
  <title>Квадраты</title>
 </head>
 <body>
  <div class="black"></div>
  <div class="white"></div>
 </body>

CSS

.black {
  background-color: black;
  width: 100px;
  height: 100px;
  border: 1px solid grey;
	box-shadow: inset 0 0 0 1px white;
}

.white {
  position: absolute;
  width: 100px;
  height: 100px;
  border: 1px solid grey; 
  background-color: white;
  left: 50px;
  top: 50px;
}