+-- Ground level --------------------------------------------+
| |
| * |
| / \ |
| ^ / \ |
| *--*--*--*--*--*--*--*--* * |
| / \ | |
| / \ | |
| <*--* *--* *--*--*--* *--* |
| |\ \ \ / | < |
| | \ \ \ / | |
| * * * * * * |
| | | | / \ |
| | | | > / \ |
| * * * * * * *--*--*--M *--*--* * |
| > | | | |\ |\ |\ | @ | |
| | | | | \| \| \ | ? | |
| * * * *--* * * * * % * |
| | | | / / v | |
| | | |/ / | |
| * * * *--*--*--* * |
| \ | \ / | |
| \| \ / | |
| *--* * M |
| v |
| |
| * *> |
| > |
| |
| * |
| > |
| |
+------------------------------------------------------------+
+-- Level -1 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -2 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -3 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -4 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -5 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -6 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -7 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -8 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -9 ------------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -10 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -11 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -12 -----------------------------------------------+
| |
| % |
| |v |
| |^ |
| % |
| |
+------------------------------------------------------------+
+-- Level -13 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -14 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -15 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -16 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -17 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -18 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -19 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -20 -----------------------------------------------+
| ^ |
| % |
| v |
| |
+------------------------------------------------------------+
+-- Level -21 -----------------------------------------------+
| ^ |
| %> |
| |
+------------------------------------------------------------+