+----+
| x
| 1 First Floor
|
+----+----+ +----+ +----+----+
| | | | |
+----+----+ + +-----+----+ +----+
| | | | | |
+ +----+ + + +-o--+ +
| | | | / | | |
+ +----+ +----+ + | + +
| | | x +----+ |
| | | + | |
| | |x | |
+----+ +----+----+ +----+----+----+
| | | | |
+----+----+----+ + +----+ +
| | | | |
+----+ +-----+----+----+ +
| | | | | |
+ +----+----+ + +----+----+