Is the floor black or red?
The floor is black.
    src        edge_attr  dst
0     0   to the left of    5
1     0  to the right of    1
2     1   to the left of    0
3     1   to the left of    9
4     1   to the left of    5
5     2   to the left of    9
6     2               of    8
7     2   to the left of    4
8     4  to the right of    7
9     4  to the right of    2
10    5  to the right of    1
11    5  to the right of    0
12    6               of    8
13    7   to the left of    4
14    7   to the left of    9
15    7               on    9
16    9  to the right of    1
17    9  to the right of    7
18    9  to the right of    2
19    9               on    9