JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>

<body>
<div class="container-fluid">


	<div class="row">
    <!-- Example of my circle -->
		<div class="col"><div class="circle" id="circle1"></div></div>

    <!-- My attempt to fill it -->
		<div class="col">
      <div class="circle" id="circle2">
        <span class="bubble"></span>
        <span class="bubble"></span>
        <span class="bubble"></span>
        <span class="bubble"></span>
        <span class="bubble"></span>
        <span class="bubble"></span>
        <span class="bubble"></span>
        <span class="bubble"></span>
      </div>
    </div>
	</div>
	
</div>
</div>


<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</body>

</html>

CSS

.circle {
    position: relative;
    height: 150px;
    width: 150px;
    border-radius: 50%;
    display: block;
    background-color: rgba(112, 48, 160);
}

.bubble {
    position: relative;
    height: 25px;
    width: 25px;
    border-radius: 50%;
    display: block;
    /*display: inline;
    margin: 0; */  /*This doesn't work*/
    background-color: black;
    z-index: 99;
}
}