What is the photo showing?
It is showing a path.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of    6
2     0  to the right of   10
3     1   to the left of    9
4     1  to the right of    3
5     1  to the right of    6
6     1          holding    0
7     2               of    6
8     3   to the left of    1
9     3   to the left of    0
10    5   to the left of    9
11    6   to the left of    0
12    6             with    8
13    6   to the left of    1
14    9  to the right of    5
15    9  to the right of    1
16   10   to the left of    0