What do both the pole and the wall have in common?
The color, both the pole and the wall are red.
   src        edge_attr  dst
0    0  to the right of    4
1    0   to the left of    8
2    2   to the left of    5
3    4   to the left of    9
4    4   to the left of    0
5    5  to the right of    2
6    8  to the right of    0
7    9  to the right of    4