What is the color of the field?
The field is green.
    src        edge_attr  dst
0     0   to the left of    8
1     0   to the left of   15
2     2  to the right of   16
3     3   to the left of   15
4     3   to the left of   10
5     3  to the right of   13
6     5  to the right of   11
7     5  to the right of    6
8     6   to the left of    5
9     8  to the right of    0
10    9  to the right of   14
11   10  to the right of    3
12   10               of   14
13   11   to the left of    5
14   12  to the right of   16
15   13       grazing in    7
16   13   to the left of   14
17   13   to the left of    3
18   14   to the left of   15
19   14   to the left of    9
20   14       grazing in    7
21   14  to the right of   13
22   14  to the right of   17
23   15  to the right of   14
24   15  to the right of    3
25   15  to the right of    0
26   16   to the left of    2
27   16   to the left of   12
28   17   to the left of   14