+-- Level +8 ---------------+
| |
| M |
| v |
| |
+---------------------------+
+-- Level +7 ---------------+
| ^ |
| % |
| v |
| |
+---------------------------+
+-- Level +6 ---------------+
| |
| M |
| | |
| | |
| % |
| v |
| |
| % |
| v |
| |
+---------------------------+
+-- Level +5 ---------------+
| ^ |
| % |
| v |
| ^ |
| % M |
| v v |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| M |
| v |
| |
+---------------------------+
+-- Level +4 ---------------+
| ^ |
| % |
| v |
| ^ ^ |
| % % |
| v v |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| ^ |
| % |
| v |
| |
+---------------------------+
+-- Level +3 ---------------+
| ^ |
| % |
| v |
| ^ ^ |
| % % |
| v v |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| ^ |
| % M |
| v v |
| |
+---------------------------+
+-- Level +2 ---------------+
| ^ |
| % |
| v |
| ^ ^ |
| % % |
| v v |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| ^ ^ |
| % % |
| v v |
| |
+---------------------------+
+-- Level +1 ---------------+
| ^ |
| % |
| v |
| ^ ^ |
| % % |
| v v |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| ^ ^ |
| % % |
| v v |
| |
+---------------------------+
+-- Ground level -----------+
| ^ |
| % |
| v |
| ^ ^ |
| % % |
| \ / |
| \ / |
| *--*--*--*--*--* |
| | | | |
| | | | |
| * % * |
| | v | |
| | | |
| * * |
| | | |
| | | |
| * * |
| | | |
| | | |
| *--*--M--*--*--* |
| / v \ |
| ^/ \^ |
| % % |
| |
+---------------------------+
+-- Level -1 ---------------+
| ^ |
| % |
| | |
| | |
| * |
| | |
| | |
| * |
| | |
| |^ |
| % |
| |
+---------------------------+