What is the color of the mat that is in the bottom?
The mat is green.
     src        edge_attr  dst
0      0  to the right of    6
1      0  to the right of   16
2      0  to the right of    7
3      0   on the side of   21
4      0  to the right of   23
..   ...              ...  ...
249   32  to the right of    4
250   32  to the right of   24
251   32  to the right of   15
252   32  to the right of   13
253   32  to the right of   14

[254 rows x 3 columns]