Does the ring look blue?
Yes, the ring is blue.
    src        edge_attr  dst
0     0   to the left of   15
1     1               on   10
2     2   to the left of    9
3     2   to the left of    4
4     3  to the right of    5
5     3  to the right of    8
6     3   to the left of   15
7     4  to the right of    7
8     4  to the right of    2
9     5   to the left of    3
10    5   to the left of   12
11    5  to the right of   14
12    7   to the left of    4
13    7   to the left of    9
14    8   to the left of    3
15    8   to the left of   12
16    8  to the right of   14
17    9  to the right of    7
18    9  to the right of    2
19   11               on   10
20   12  to the right of    8
21   12               on   10
22   12   to the left of   15
23   12  to the right of    5
24   14   to the left of    5
25   14   to the left of    8
26   15  to the right of    0
27   15  to the right of    3
28   15  to the right of   12
29   15   to the left of   16
30   16  to the right of   15