Does the box look green?
Yes, the box is green.
    src        edge_attr  dst
0     1  to the right of    3
1     2  to the right of    8
2     3   to the left of    6
3     3  to the right of    5
4     3   to the left of    1
5     4  to the right of    5
6     4           inside    9
7     4  to the right of    7
8     4   to the left of   10
9     5   to the left of    7
10    5   to the left of    4
11    5   to the left of    3
12    6  to the right of    3
13    7  to the right of    5
14    7   to the left of    4
15    8   to the left of    9
16    8   to the left of    2
17    9  to the right of    8
18   10  to the right of    4