JSFiddle - React, Tailwind, and code Playground

HTML

<div id="left"></div>
<div id="right"></div>

CSS

#left{
    float:right;
    width:200px;
    height:500px;
    background:red;   
}

#right{
    margin-right: 200px; 
    height:500px;
    background:blue;
}