The zone for (0, 2) is bounded by walls
    1
    2
    3
    4
The zone for (0, 5) is bounded by walls
    0
    1
    4
    5
The zone for (-6, 0) is bounded by walls
    2
    3
    4
    5
The zone for (6, 0) is bounded by walls
    0
    1
    2
    3
The zone for (-4, -2) is bounded by walls
    0
    1
    2
    3
    4
    5
The zone for (4, -2) is bounded by walls
    0
    1
    2
    3
    4
    5
The zone for (-8, -6) is bounded by walls
    0
    1
    2
    3
    4
    5
The zone for (8, -6) is bounded by walls
    0
    1
    2
    3
    4
    5
The zone for (20, -14) is bounded by walls
    0
    1
    2
The zone for (-20, -14) is bounded by walls
    3
    4
    5