<html>
<body>
<h1 style="text-align:center">This is heading 1</h1>
<h2 style="text-align:left">This is heading 2</h2>
<h3 style="text-align:right">This is heading 3</h3>
<h4 style="text-align:justify">This is heading 4</h4>
</body>
</html>