:::
14. Background color
15. Aligning the text(對齊)
<!DOCTYPE html>
<html>
<head>
<title>Sexy background color!</title>
</head>
<body>
<h3 style="text-align:center">Favorite Football Teams</h3>
<ol>
<li style="text-align:left">The Hawthorn Football Club</li>
<li style="text-align:center">San Franscisco 49ers</li>
<li style="text-align:right">Barcelona FC</li>
</ol>
</body>
</html>