Is the white moon down or is it up?
The moon is up.
    src        edge_attr  dst
0     1           behind    5
1     1           behind    3
2     3               in    0
3     3      in front of    1
4     5      in front of    1
5     5               in    0
6     6  to the right of   11
7     6  to the right of   12
8     7   to the left of   10
9     8  to the right of   10
10    9  to the right of   12
11    9  to the right of   11
12   10   to the left of    8
13   10  to the right of    7
14   11   to the left of    9
15   11   to the left of    6
16   11  to the right of   12
17   12   to the left of    6
18   12   to the left of    9
19   12   to the left of   11
20   14               in   13