JSFiddle - React, Tailwind, and code Playground

HTML

<div id='box1' class='box'></div>
<div id='box2' class='box'></div>

CSS

.box {
     width: 200px;
     height: 200px;
}

#box1 {
    background: rgba(255, 0, 0, 0.3);
}

#box2 {
    position: absolute;
    left: 100px;
    top: 100px;
    background: rgba(0, 0, 255, 0.3);
}