JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
  <div class="Box"></div>
  <div class="Box"></div>
  <div class="Circle"></div>
</div>

CSS

.container
{
  position: relative;
  display:block;
  width: 300px;
}

.container .Box:first-of-type
{
  margin-bottom: 5px;
}

.Box
{
  position: relative;
  display: block;
  background-color: #333;
  height: 100px;
}

.Circle
{
  position: absolute;
  height: 80px;
  width: 80px;
  background-color: #F0C;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  margin-top: -40px;
  margin-left: -40px;
}