Is the black ball in the bottom part or in the top?
The ball is in the bottom of the image.
    src        edge_attr  dst
0     0  to the right of   17
1     1  to the right of   17
2     1   to the left of    4
3     2  to the right of    8
4     2  to the right of   18
..  ...              ...  ...
71   18   to the left of    2
72   18   to the left of   14
73   18   to the left of   12
74   18   to the left of    8
75   18   to the left of   15

[76 rows x 3 columns]