<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
h1{
border:5px solid red;
padding:20px;
margin:20px;
display:block;
width:100px;
}
</style>
</head>
<body>
<h1>CSS</h1>
<h1>CSS</h1>
</body>
</html>
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.