JSFiddle - React, Tailwind, and code Playground

HTML

<div class="left"></div>
<div class="right"></div>

CSS

div {
  width: 50px;
  height: 50px;
  border-right:  2px solid darkblue;
  border-bottom: 2px solid darkblue;
  
  float: left;
  margin: 40px;
}

.left {
  transform: rotate(135deg);
}

.right {
  transform: rotate(-45deg);
}