EMPTY CIRCLE

Run
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML</title>
<style>
    .circle {
	  border-radius: 50%;
	  height: 30px;
	  width: 30px;
	  background: #cccccc;
	 }
	
</style>
</head>
<body>
   <h2> Empty circle </h2>
   <div class="circle"></div>
</body>
</html>