What color does the arrow have?
The arrow has blue color.
    src        edge_attr  dst
0     0  on the front of   29
1     0  to the right of   26
2     0  to the right of   12
3     0   to the left of    7
4     0   to the left of   11
..  ...              ...  ...
83   27   to the left of    3
84   27  to the right of    9
85   27   to the left of   23
86   28  to the right of   10
87   28  to the right of    3

[88 rows x 3 columns]