Does the bus look red?
No, the bus is blue.
   src        edge_attr  dst
0    0   to the left of    7
1    1   to the left of    4
2    4  to the right of   10
3    4   to the left of    6
4    4  to the right of    1
5    6  to the right of    4
6    7               on    8
7    7  to the right of    0
8   10   to the left of    4