It seems like this would be pretty easy to do with XPM2. Duplicate certain colours as [.,<>+-] (at the beginning of a program, that's a no-op) and insert the pr

It seems like this would be pretty easy to do with XPM2. Duplicate certain colours as [.,<>+-] (at the beginning of a program, that's a no-op) and insert the program into the pixel data. It's probably less well-hidden though, since someone's more likely to look at it in a text editor. http://en.wikipedia.org/wiki/X_PixMap#XPM2 http://en.wikipedia.org/wiki/X_PixMap#XPM2