JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
		<div class="sqrBall">

		</div>
	</div>

CSS

.container{
			width: 500px;
			height: 500px;
			border: 1px solid black;
			margin: 0 auto;
		}
		.sqrBall{
			width: 10px;
			height: 10px;
			background-color: blue;
			
		}