<div class='container'><h1 class='title'>Hello, World!</h1><p class='description'>This is a demonstration of the margin property in CSS.</p></div>

.container { background-color: lightblue; padding: 20px; }
.title { margin-bottom: 20px; color: darkblue; }
.description { margin: 40px; color: darkgreen; }

// No JavaScript required for this demo

Hello, World!

This is a demonstration of the margin property in CSS.