JSFiddle - React, Tailwind, and code Playground

CSS

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  background-image:
    linear-gradient(
      to right,
      #000 0,
      #000 1px,
      transparent 1px,
      transparent 100%
    );
  background-position: calc(50% - 120px); 0;
  background-size: 240px;
}