JSFiddle - React, Tailwind, and code Playground

by Mukul kant

HTML

<div class='halfCycle'>
    
</div>

CSS

body{
    background: #303030;
}	
.halfCycle{
    background: #383838;
    height: 42px;
    width: 20px;
    border:1px solid #202020;
    border-radius: 0 60px 60px 0;
    border-left: none;
    position: relative; 
    box-shadow:5px 0px 5px 0px #222;
}	
.halfCycle:after{
    content: '';border:1px solid #383838;
    position: absolute;
    height: 44px;
    width: 21px;
    left:0;
    top:-2px;
    border-radius: 0 60px 60px 0;
    border-left:none;
}