<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<body>
<div class="w3-container">
<h2>w3-section</h2>
<p>The w3-section adds a 16px top and bottom margin to an element.</p>
<p>This makes an element behave like a paragraph:</p>
<div class="w3-container w3-green">
<p>Tokyo is the center of the Greater Tokyo Area,
and the most populous metropolitan area in the world.</p>
</div>
<div class="w3-container w3-red">
<p>Tokyo is the center of the Greater Tokyo Area,
and the most populous metropolitan area in the world.</p>
</div>
<div class="w3-container w3-section w3-green">
<p>Tokyo is the center of the Greater Tokyo Area,
and the most populous metropolitan area in the world.</p>
</div>
<div class="w3-container w3-section w3-red">
<p>Tokyo is the center of the Greater Tokyo Area,
and the most populous metropolitan area in the world.</p>
</div>
</div>
</body>
</html>