What is before the wall?
The plant is in front of the wall.
    src        edge_attr  dst
0     0   to the left of   10
1     0   to the left of   11
2     1   to the left of    9
3     3           behind   11
4     4  to the right of    7
5     4  to the right of    5
6     5  to the right of    6
7     5  to the right of   11
8     5   to the left of    4
9     5  to the right of    7
10    6   to the left of    5
11    6   to the left of   11
12    7   to the left of    4
13    7   to the left of    5
14    8  to the right of    9
15    9   to the left of    8
16    9  to the right of    1
17   10  to the right of    0
18   10   to the left of   11
19   11      in front of    3
20   11  to the right of    6
21   11  to the right of    0
22   11   to the left of    5
23   11  to the right of   10