I'm experimenting with color variations of the offset square pattern, as seen here.
This one is a black-and-white version. It has to be smaller, because I don't have any more of the black slopes. A two-tone version allows me to make a larger pattern. The pattern is rather washed out against the white background, but I guess it's good enough for documentation purposes.
I'm looking for a certain look, and I haven't found it yet, but I think I'm getting closer. I'm pretty limited in my color selection, for now, which is why everything is white, black, or dark red. :-)