I originally made the thin black stripes 1/4″ wide. It did not look right so I tried to make them 1/8″ wide. When I did that, I could no longer make them straight or parallel. I also had the block “crash” on me. Ithink that the arcs and me trying to get the lines straight made too many nodes. So, I converted everything to guidelines and started over. This at least kept it from crashing again even though I was not able to get straight and parallel line.