JSFiddle - React, Tailwind, and code Playground

by vadimkot

HTML

<div>
    <span class="top"></span>     
    <span class="bottom"></span>
</div>

CSS

body{
    background: #000;
}

div{
    width: 200px;
    height: 200px;      
    margin: 25px auto;
    position: relative;    
    background:
         -webkit-radial-gradient(0 100%, circle, transparent 24px, #00f 25px),
         -webkit-radial-gradient(100% 100%, circle, transparent 24px, #00f 25px),
         -webkit-radial-gradient(100% 0, circle, transparent 24px, #00f 25px),
         -webkit-radial-gradient(0 0, circle, transparent 24px, #00f 25px);
    background-position: bottom left, bottom right, top right, top left;    
    background-size: 50% 50%;
    background-repeat: no-repeat;

}