What color is the arrow?
The arrow is white.
    src        edge_attr  dst
0     0  to the right of   13
1     1           behind    8
2     1   to the left of    6
3     1   to the left of   11
4     3  to the right of    7
5     5   to the left of    6
6     6  to the right of   14
7     6  to the right of    1
8     6  to the right of   13
9     6  to the right of    5
10    7   to the left of    3
11    8  to the right of   10
12    9  to the right of   13
13   10   to the left of    8
14   10   to the left of   13
15   11  to the right of    1
16   11  to the right of   13
17   13   to the left of    9
18   13  to the right of   10
19   13   to the left of    6
20   13               by    7
21   13   to the left of    0
22   13   to the left of   11
23   14   to the left of    6