The ruler has been confusing me although I think I am getting the hang of it. The book comes with three pattern peices, "A" and two "B's". "B's" overlay "A" at different positions and changes size (the amount of "B" displayed). Designs take two, three, or four "B's." When I think I have it, I make a sample, as suggested, but it does not look as it should. I have done one design but it took taking it apart and putting it back together many times. As I said before, maybe the whole thing is related to my lack of experience.