JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">

  <div class="rectangle"></div>
  <div class="rectangle"></div>

  <div class=""></div>

  <div class="rectangle"></div>
  <div class="rectangle"></div>
</div>

CSS

.container {
  font-size: 0;
}

.rectangle {
  width: 25px;
  height: 25px;
  background: #ccc;
  display: inline-block;
  margin: 0px;
  padding: 0px;
}