Is there any brown grass or mud?
No, there is grass but it is green.
    src        edge_attr  dst
0     0  to the right of   21
1     0   to the left of   17
2     2   to the left of   12
3     2  to the right of   10
4     2  to the right of    3
5     3   to the left of    2
6     3   to the left of   12
7     3   to the left of   10
8     6   to the left of    7
9     7  to the right of    6
10    8   to the left of   14
11    9   to the left of   14
12   10  to the right of    3
13   10   to the left of    2
14   10   to the left of   12
15   11   to the left of   17
16   11  to the right of   21
17   12  to the right of   10
18   12  to the right of    3
19   12  to the right of    2
20   13  to the right of   17
21   14  to the right of    8
22   14  to the right of    9
23   14  to the right of   16
24   16   to the left of   14
25   17  to the right of    0
26   17  to the right of   11
27   17   to the left of   13
28   19               on   18
29   21   to the left of    0
30   21   to the left of   11