What is the white sheep doing?
The sheep is standing.
    src        edge_attr  dst
0     0  to the right of    1
1     0   to the left of    7
2     1   to the left of    0
3     3  to the right of   11
4     3  to the right of   10
5     5   to the left of    6
6     5   to the left of    9
7     6  to the right of    5
8     6  to the right of    9
9     7  to the right of    0
10    7  to the right of    8
11    8               of    1
12    8   to the left of    7
13    9  to the right of    5
14    9   to the left of    6
15   10   to the left of    3
16   11               on   10
17   11   to the left of    3