+-- Level +4 -------------------------------------------+
| |
| %--*--*--*> |
| v |
| |
+-------------------------------------------------------+
+-- Level +3 -------------------------------------------+
| ^ |
| % |
| | |
| | |
| * |
| / |
| / |
| % |
| v |
| |
+-------------------------------------------------------+
+-- Level +2 -------------------------------------------+
| ^ |
| % |
| / |
| / |
| %--*--*--* |
| v |
| |
+-------------------------------------------------------+
+-- Level +1 -------------------------------------------+
| |
| % |
| v\ |
| \ ^ |
| *--*--% |
| |
+-------------------------------------------------------+
+-- Ground level ---------------------------------------+
| |
| %--*--*--* |
| |v \ |
| | \ ^ |
| * *--% |
| | |
| | |
| *--* |
| \ |
| \ |
| * |
| | |
| | |
| *--*--* |
| / \ |
| / \ |
| * * |
| | | |
| | | |
| * * |
| / |
| / |
| * |
| | |
| | |
| * |
| | |
| | |
| * |
| | |
| | |
| * |
| | |
| | |
| * |
| \ |
| \ |
| *--*> |
| |
+-------------------------------------------------------+