<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My First Webpage</title>
<style>
body{
font-family: Arial, sans-serif;
line-height: 1.6;
margin: 0;
padding: 20px;
}
</style>
</head>
<body>
<marquee>Basic HTML Tags</marquee>
<h1>This is Heading 1.</h1>
<h2>This is Heading 2.</h2>
<h3>This is Heading 3.</h3>
<h4>This is Heading 4.</h4>
<h5>This is Heading 5.</h5>
<h6>This is Heading 6.</h6>
<p>This is a paragraph. It demonstrates the use of paragraph tag in HTML</p>
<hr>
<b>Bold Text</b><br>
<i>Italic Text</i><br>
<u>Underlined text</u><br>
<strong>Strong Text</strong><br>
<em>Emphasized Text</em><br>
text with <sub>subscript</sub> and <sup>superscript</sup>
</body>
</html>