<!DOCTYPE html>
<html>
<head>
<style>
body {background-color: powderblue;}
h1   {color: blue;}
p    {color: red;}
</style>
</head>
<body>

<h1>tiêu đề 1</h1>
<p>Lập trình từ đầu</p>

</body>
</html>

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External JavaScript

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