JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

<div id="decortique"></div>

CSS

div {
    width: 0;
    height: 0;
    border: 25px solid red;
    border-color: red yellow blue green;
    
    margin-bottom: 20px;
}

#decortique {
    width: 50px;
    height: 50px;
}