Is this a green house?
No, this is a white house.
    src        edge_attr  dst
0     0   to the left of    9
1     1   to the left of    9
2     2   to the left of    9
3     6   to the left of    9
4     6   to the left of   14
5     8   to the left of    9
6     8   to the left of   17
7     8   to the left of   15
8     9  to the right of    2
9     9  to the right of    6
10    9  to the right of   13
11    9  to the right of    8
12    9  to the right of   11
13    9  to the right of    1
14    9  to the right of    0
15   11   to the left of   17
16   11   to the left of    9
17   13   to the left of   15
18   13   to the left of   14
19   13   to the left of    9
20   14  to the right of    6
21   14  to the right of   13
22   15  to the right of    8
23   15  to the right of   13
24   17  to the right of   11
25   17  to the right of    8