JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
    <div class="over">
    </div>
</div>

CSS

.main {width: 150px; height: 100px; background: yellow;}
.over {position: absolute; width: 50px; height: 50px; background: black; margin: 25px 0 0 50px;}