JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
<div class="left"></div>
<div class="right"></div>
</div>

CSS

.main {
width:200px; overflow:hidden; height:100px;
}
.left {
    float:left; background-color:red; width:50px; height:50px;
}
.right {
    float:right; background-color:blue; width:50px; height:50px;box-shadow: 3px 3px 5px 0px ;
}