<!DOCTYPE html>
<html lang="en">
<head>
<title>Learn CSS</title>
</head>
<body>
<p>Standard button: </p><button class="first-class">click here</button>
<div id="parentDiv">
<p>Inside parentDiv: </p>
<button class="first-class">New Button </button>
</div>
</body>
</html>