JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

body {
  background: grey;
}

div {
  width: 500px;
  height: 300px;
  margin: 5em auto;
  background: linear-gradient(to bottom, white 0, white 100px, blue 100px, blue 200px, red 200px); 
}