[1,0,-2,0,1,0,1,0,-2,0,1,0,1,0,-2,0,1,0,1,0,1,0, -2,0,1,0,1,0,-2,0,1,0,1,0,-2,0,1,0,1,0,1,0,-2,0,1, 0,1,0,-2,0,1,0,1,0,-2,0,1,0,1,0]