Background images repeat in both directions by default
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Listing 5-9. A tiling background image</title>
<style type="text/css">
body {
background-image: url(images/background.gif);
}
</style>
</head>
<body>
<p>this is a text.</p>
<p>this is a text.</p>
<p>this is a text.</p>
<p>this is a text.</p>
<p>this is a text.</p>
<p>this is a text.</p>
<p>this is a text.</p>
<p>this is a text.</p>
<p>this is a text.</p>
</body>
</html>