What color is that door?
The door is black.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of    1
2     0   to the left of    5
3     0  to the right of    4
4     1   to the left of    0
5     1      attached to    3
6     2   to the left of    5
7     3               on    4
8     3   to the left of    0
9     3   to the left of    5
10    4   to the left of    0
11    4   to the left of    5
12    5  to the right of    4
13    5  to the right of    0
14    5  to the right of    3
15    5  to the right of    2