How do I add this code to my wordpress blog?

That's just a link to his site. Try some of the codes at a href="http://ult-tex.net/counts/christmas/index.cgi" rel="nofollow"http://ult-tex.net/counts/christmas/inde…/a (I know the first one works, I put it on my test site.) Just copy the code, go to the spot on your post that you want the banner to show (in HTML view) and paste the code.