Is the color of the tiles green?
Yes, the tiles are green.
    src        edge_attr  dst
0     0            under    6
1     0   to the left of   10
2     0            below    6
3     2  to the right of    6
4     2  to the right of    8
5     5  to the right of    8
6     5  to the right of    6
7     6             near   10
8     6   to the left of   10
9     6   to the left of    2
10    6            above    0
11    6   to the left of    5
12    7  to the right of    9
13    8   to the left of   10
14    8   to the left of    5
15    8   to the left of    2
16    9   to the left of    7
17   10  to the right of    8
18   10          next to    6
19   10  to the right of    0
20   10             near    6
21   10  to the right of    6