Thanks Remus.
I was hoping you could just continuously draw lines with the colors you choose. It seems like it should be easy, given all the different coordinates in different colors, etc. Isn't there a "line color" pallette so that as you draw, the lines would be the color you wanted and not have to paint them later? Like "now I'm drawing in red, now I'm drawing in green, etc. At any rate, thanks for your help.