JSFiddle - React, Tailwind, and code Playground

HTML

<body>

    <div id="container">Container



    </div>
     <div id="inner">Inner</div>

</body>

CSS

#container { 
        background-color:#b6ff00;
        width:500px;
        height:500px;
        position:relative;
        }

        #inner {
        background-color:#ffd800; width:500px;
        height:500px;
position:relative;
        }