[0,1,2,3,4,5,6,5,4,3,2,1,0,1,2,3,4,5,6,5,4,3,2,1, 0,1,2,3,4,5,6,5,4,3,2,1,0,1,2,3,4,5,6,5,4,3,2,1,0, 1,2,3,4,5,6,5,4,3,2,1,0,1,2,3,4,5,6,5,4,3,2,1,0,1, 2,3,4,5,6,5,4,3,2,1,0,1]