<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title style="color: red">This is a good test</title>
</head>
<body>
<h1 style="font-size: 300%;font-style:normal; text-align: center" >This is a heading</h1>
<p style="background-color: aquamarine; color: red; text-align: center">
hello everyone, welcome to read my <sup>html</sup> learning code <sub>html5</sub>, thank <del>you</del> <small>for</small> coming<strong> here</strong> for <mark>fun</mark>> </p>
<hr>
HTML Text Formatting Elements
<hr>
Tag Description<br>
b Defines bold text<br>
em Defines emphasized text<br>
i Defines italic text<br>
small Defines smaller text<br>
strong Defines important text<br>
sub Defines subscripted text<br>
sup Defines superscripted text<br>
ins Defines inserted text<br>
del Defines deleted text<br>
mark Defines marked/highlighted text<br>
<hr>
</body>
</html>