Is the ground smooth and tan?
No, the ground is smooth but silver.
    src        edge_attr  dst
0     0   to the left of    2
1     1   to the left of    9
2     1   to the left of    8
3     1   to the left of    3
4     1   to the left of   11
5     2  to the right of    0
6     2  to the right of    4
7     3   to the left of    6
8     3   to the left of    7
9     3   to the left of    8
10    3  to the right of   11
11    3  to the right of    9
12    3  to the right of    4
13    3  to the right of    1
14    4   to the left of    8
15    4   to the left of    3
16    4   to the left of    2
17    6  to the right of    8
18    6   to the left of    7
19    6  to the right of    9
20    6  to the right of   11
21    6  to the right of    3
22    7  to the right of    6
23    7  to the right of    3
24    7  to the right of    8
25    8  to the right of   11
26    8  to the right of    3
27    8   to the left of    6
28    8  to the right of    1
29    8  to the right of    4
30    8   to the left of    7
31    8  to the right of    9
32    9   to the left of    3
33    9   to the left of    6
34    9  to the right of    1
35    9   to the left of   11
36    9   to the left of    8
37   11   to the left of    8
38   11  to the right of    9
39   11   to the left of    6
40   11  to the right of    1
41   11   to the left of    3