JSFiddle - React, Tailwind, and code Playground

HTML

<div class="foo">
</div>
<div class="bar"></div>
<div class="foo">
</div>

CSS

.foo{
    height:100px;
    width:200px;
    background:red;
    margin:0 auto;
}
.bar{
    width:50%;
    height:100px;
    background:blue;
}