Use the <pre> tag! Put it before and after your EXAMPLE.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Example</title>
</head>
<body>
<pre>
###### # # ## # # ##### # ######
# # # # # ## ## # # # #
##### ## # # # ## # # # # #####
# ## ###### # # ##### # #
# # # # # # # # # #
###### # # # # # # # ###### ######
</pre>
</body>
</html>