thanks for the reply.
But if i place 2 blocks on top of the other, won't it just plot off the object that is currently shown on top and it's associated colour?
that's the problem i'm currently encountering. If I send Red block to back, it will plot Blue. If I send Blue block to back, it will plot Red. I'm not sure how I can get the printer to plot both of them and their associated colours at the same time