strip = [ [ -0.6, 0.05, -0.2 ], [ -0.2, 0.08, -0.2 ], [ 0.2, 0, -0.2 ], [ 0.6, -0.05, -0.2 ], [ -0.6, 0.05, 0.2 ], [ -0.2, -0.05, 0.2 ], [ 0.2, 0.08, 0.2 ], [ 0.6, 0.05, 0.2 ], ];