Do the glasses have red color?
No, the glasses are black.
    src        edge_attr  dst
0     0  to the right of   12
1     0  to the right of   10
2     0  to the right of    5
3     0   to the left of    2
4     0   to the left of    8
..  ...              ...  ...
79   15   to the left of    8
80   15   to the left of    2
81   16   to the left of    8
82   16   to the left of    4
83   16   to the left of    2

[84 rows x 3 columns]