Do the clouds have white color?
No, the clouds are blue.
   src        edge_attr  dst
0    0               on    1
1    4   to the left of    8
2    4  to the right of    9
3    5               of    0
4    6  to the right of    7
5    7   to the left of    6
6    8               of    0
7    8  to the right of    4
8    9   to the left of    4