Do the clouds have white color?
Yes, the clouds are white.
    src        edge_attr  dst
0     0  to the right of   10
1     1  to the right of    5
2     2  to the right of    5
3     2            above    4
4     3  to the right of    5
5     4  to the right of   10
6     4            below    2
7     5   to the left of   11
8     5   to the left of    2
9     5   to the left of    3
10    5   to the left of   15
11    5   to the left of    1
12    7   to the left of    9
13    9  to the right of    7
14   10   to the left of    4
15   10   to the left of    0
16   11  to the right of    5
17   14               on   12
18   15  to the right of    5