3 cos t 0 0 400 400 20 0.9 0.9 0 0 0 0 1 1 0 1 55 0 65 1 1 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0.9 0.9 0 0 0 0 1 1 0 1 0 0 0 0 0