splinecurves2d 3 12 -2.5 -3.5 1 2.5 -3.5 1 2.5 -1 1 1.5 -1 1 1.5 -2.5 1 -1.5 -2.5 1 -1.5 2.5 1 1.5 2.5 1 1.5 1 1 2.5 1 1 2.5 3.5 1 -2.5 3.5 1 12 1 0 2 1 2 1 1 0 2 2 3 1 1 0 2 3 4 1 1 0 2 4 5 1 1 0 2 5 6 1 1 0 2 6 7 1 1 0 2 7 8 1 1 0 2 8 9 1 1 0 2 9 10 1 1 0 2 10 11 1 1 0 2 11 12 1 1 0 2 12 1 1