Does the floor look light brown?
Yes, the floor is light brown.
   src        edge_attr  dst
0    0   to the left of    1
1    1  to the right of    0
2    1  to the right of    3
3    2   to the left of    3
4    3  to the right of    2
5    3        on top of    0
6    3   to the left of    1