4 0.0 0.0 1.0 -1.5 -1.5 0.5 1.5 1.5 0.5 -2.0 2.0 3.5 3 3.0 2.0 2.0 0.0 -0.5 1.0 0.0 0.0 2.0 5 -2.0 0.0 1.0 1.0 -1.0 1.0 0.0 1.0 0.5 2.0 0.0 1.0 -1.0 1.0 1.0 -1