Floor: 0
O O C O-O
| | | | | 
O O-C O-O
|   | | | 
O-O C O-O
  | | | | 
I-C-E-C-C
    | | | 
O-O-C-O O
     
Floor: 1
O-O-C O O
| | | | | 
O-O C O-O
| | | | | 
O O C O-O
    | |   
C-C-E-C-C
| | | |   
O-O C O-O
     

