JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
<div class="green">test</div><div class="green">test</div><div class="green">test</div><div class="green">test</div>
</div>

CSS

html,body {
  background-color: rgba(40,40,40)
}

.container {
  width: 100%;
  height: 200px;
  background-color: rgba(0,0,40);
}

.green {
  /* Make min width dynamic. I.E if I have 5 items it'd be 20%, if I had 6, 16.6666667. */
  min-width: 25%;
  background-color: rgba(0,40,0);
  height: 180px;
  display: inline-block;
}