Is this a tan fence?
No, this is a black fence.
    src        edge_attr  dst
0     0  to the right of   15
1     0  to the right of    5
2     0  to the right of   10
3     1   to the left of   14
4     1  to the right of    6
5     2  to the right of   16
6     5   to the left of    0
7     6   to the left of    1
8     9  to the right of   18
9     9  to the right of   16
10    9  to the right of   12
11    9  to the right of   20
12    9  to the right of   19
13   10   to the left of    0
14   12  to the right of   20
15   12   to the left of    9
16   14               in   13
17   14  to the right of    1
18   15   to the left of    0
19   16   to the left of    9
20   16   to the left of    2
21   18   to the left of    9
22   19   to the left of   20
23   19   to the left of    9
24   20   to the left of   12
25   20   to the left of    9
26   20  to the right of   19