JSFiddle - React, Tailwind, and code Playground

HTML

<div class="box">
    <div class="box1"></div>
    <div class="box2"></div>
</div>

CSS

.box1{
    background: green;
    width: 100px;
    height: 30px;
    margin-bottom: 10px;
}

.box2{
    background: green;
    width: 100px;
    height: 30px;
    margin-top: 10px;
}