Is the water still?
No, the water is choppy.
    src        edge_attr  dst
0     0               in    5
1     0   to the left of    1
2     1  to the right of    0
3     1  to the right of    3
4     1  to the right of    6
5     2   to the left of    4
6     3   to the left of    4
7     3   to the left of    1
8     4  to the right of    2
9     4  to the right of    3
10    6               on    3
11    6   to the left of    1