What color do the clouds have?
The clouds have white color.
    src        edge_attr  dst
0     0   to the left of   10
1     0             near    2
2     1             near    2
3     1             near    6
4     2             near    0
5     2             near    6
6     2             near    1
7     3  to the right of   10
8     6             near    2
9     6             near    1
10   10  to the right of    0
11   10   to the left of    3