Do you see any red coat there?
No, there is a coat but it is black.
    src        edge_attr  dst
0     0   to the left of    7
1     0   to the left of   13
2     0   to the left of   12
3     0   to the left of    9
4     0   to the left of    8
5     0   to the left of    2
6     0   to the left of   14
7     0   to the left of    5
8     0   to the left of    4
9     0  to the right of   11
10    0   to the left of   10
11    2  to the right of    0
12    2   to the left of    7
13    4  to the right of    0
14    4   to the left of    7
15    5  to the right of    0
16    5  to the right of    8
17    7  to the right of    0
18    7  to the right of    2
19    7  to the right of    4
20    7  to the right of   15
21    8   to the left of    5
22    8  to the right of    0
23    9  to the right of    0
24    9  to the right of   15
25   10  to the right of   15
26   10  to the right of   13
27   10  to the right of    0
28   11   to the left of   15
29   11   to the left of    0
30   12  to the right of    0
31   12  to the right of   15
32   13  to the right of    0
33   13   to the left of   10
34   14  to the right of    0
35   15   to the left of    7
36   15   to the left of   10
37   15   to the left of    9
38   15   to the left of   12
39   15  to the right of   11