So, using the digits of pi as our directive, we would walk: 0 (0,0) 1 (-3,0) 2 (-3,-1) 3 (-7,-1) 4 (-7,-2) 5 (-2,-2) 6 (-2,7) 7 (0,7) 8 (0,1) 9 (5,1) 10 (5,4) etc. I suppose we'll get back to (0,0) eventually, but not for a while. ;)