What is on the wall?
The spots are on the wall.
    src        edge_attr  dst
0     0  to the right of   23
1     0  to the right of   20
2     1   to the left of   14
3     1   to the left of   18
4     2  to the right of   17
..  ...              ...  ...
60   25               on   22
61   25   to the left of    2
62   25  to the right of   11
63   25   to the left of   16
64   25  to the right of   17

[65 rows x 3 columns]