<!DOCTYPE html>
<html>
<head>
<style>
a:link {
background-color: yellow;
}
</style>
</head>
<body>
<a href="../index.html">W3Sschools</a>
<a href="../../www.wikipedia.org/index.html">Wikipedia</a>
<p><b>Note:</b> The :link selector style links to pages you have not visited yet.</p>
</body>
</html>