Is the black mat on the left side?
No, the mat is on the right of the image.
    src        edge_attr  dst
0     0  to the right of    8
1     1   to the left of    8
2     1   to the left of    5
3     2  to the right of    8
4     2   to the left of    7
5     3  to the right of    8
6     4         covering    6
7     4               on    6
8     5  to the right of    1
9     6       covered in    4
10    6       covered by    4
11    7  to the right of    8
12    7  to the right of    2
13    8   to the left of    0
14    8   to the left of    7
15    8   to the left of    3
16    8   to the left of    2
17    8  to the right of    1