This is a concept I had long time ago: an "invisible image"
I've never saw anything like this on the web (and I searched).
I though I should do it before someone else have the same idea.
There are several ways to find the hidden drawing. It's up to you!
Tip: "A ghost loves dark and is shy in light"
I hope you'll like it!
© 2011 Mathieu Beaulieu
Insert copy here, which should vary depending on your region.