+-- Ground level ---------------+
| < > |
| *> <* |
| | \ |
| | ^ \ > |
| <*--* * * |
| \/ \ | |
| /\ \ | < |
| / *> * *> *--*> |
| / | \ / / | |
| < / | \ / / | |
| *--*--* * * * |
| | \ / \/ \ | |
| | \ / /\ \ | |
| <*--* *--*--* *> * *> |
| /| / | | | | / |
| / | / | | | |/ |
| * *--* * * <* * |
| < | \ / \ v > v |
| | \ / \ ^ ^ |
| * * *--*--*--*> |
| < \ | | v |
| \ | | |
| *--* * |
| / \ / |
| ^/ \ / |
| <% * |
| > / \ |
| / \ |
| <* * |
| \ |> |
| \ | |
| * * |
| | / |
| |/ |
| <* |
| |
+-------------------------------+