Which color are the walls?
The walls are brown.
     src        edge_attr  dst
0      0          wearing    4
1      0          wearing   15
2      0           riding    5
3      0   to the left of   23
4      0  to the right of   27
..   ...              ...  ...
146   28   to the left of   18
147   29  to the right of   12
148   29  to the right of   11
149   29  to the right of   10
150   29  to the right of    9

[151 rows x 3 columns]