0 0 0 is looking at 0 1 0
0 1 0 is looking at 0 2 0
0 2 0 is looking at -1 -3 0 (change)
0 3 0 is looking at 0 4 0
0 4 0 is looking at 2 3 0
0 -1 0 is looking at 0 0 0
0 -2 0 is looking at 0 -1 0
0 -3 0 is looking at 0 -2 0
0 -4 0 is looking at 2 -3 0
1 3 0 is looking at 0 3 0
2 3 0 is looking at 1 3 0
-1 3 0 is looking at -2 3 0
-2 3 0 is looking at -1 3 0 (change)
1 -3 0 is looking at 0 -3 0
2 -3 0 is looking at 1 -3 0
-1 -3 0 is looking at -2 -3 0 (change)
-2 -3 0 is looking at 0 -4 0