HELP NEEDED

I have been struggling with a html/javascript problem for nearly a week now. Is there anyone in the CFZ readership who is less of a dunce on the subject than me, and who can help me do something that appears to be relatively simple?

I just want to put this effect: http://jsfiddle.net/esteewhy/5Ht3b/6/
on the background of a webpage. But I can't

HELP!!!!!

Email me on jon@eclipse.co.uk if you can help