<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.red {
color: red;
}
.orange {
color: orange;
}
</style>
</head>
<body>
<h1>Example of the HTML class attribute</h1>
<p class="red">It is a some red paragraph.</p>
<p>This is a some text.</p>
<p class="orange">It is a some yellow paragraph.</p>
</body>
</html>