What is the color of the mat?
The mat is green.
    src        edge_attr  dst
0     0  to the right of   11
1     1  to the right of    2
2     2   to the left of    5
3     2  to the right of   20
4     2   to the left of    1
..  ...              ...  ...
56   20   to the left of   11
57   20   to the left of    2
58   21   to the left of    7
59   21   to the left of    8
60   21   to the left of   11

[61 rows x 3 columns]