JSFiddle - React, Tailwind, and code Playground

HTML

<div id="parent">
    <div id="top"></div>
</div>

<div id="bottom"></div>

CSS

#parent {
    position: fixed;
    height: 200px;
    width: 200px;
    background: red;
}

#top {
    position: absolute;
    height: 50px;
    width: 50px;
    z-index: 10;
    background: yellow;
    left: 150px;
    top: 5px;
}

#bottom {
    height: 100px;
    width: 150px;
    position: absolute;
    background: green;
    top: 30px;
    left: 30px;
}