JSFiddle - React, Tailwind, and code Playground

HTML

<div class="some-div">
</div>

CSS

.some-div {
  display: inline-block;
  width: 350px;
  height: 270px;
  border: 1px solid #000;
 }

.some-div {
  position: relative;
}

.some-div:before {
  content: '';
  position: absolute;
  width: 1px;
  height: 20px;
  background: red;
  left: 50%;
  top: 50%;
  margin-left: -1px;
}

.some-div:after {
  content: '';
  position: absolute;
  height: 1px;
  width: 100%;
  background: red;
  top: 50%;
  margin-top: -1px;
}