Do you see dark plates?
Yes, there is a dark plate.
    src        edge_attr  dst
0     0  to the right of    3
1     0  to the right of   15
2     0   to the left of   22
3     1  to the right of    2
4     1   to the left of   21
5     1   to the left of    9
6     2  to the right of    4
7     2   to the left of    1
8     2   to the left of   11
9     2  to the right of   17
10    3   to the left of   16
11    3   to the left of    0
12    4   to the left of    2
13    4   to the left of   11
14    5   to the left of    6
15    5  to the right of   23
16    6  to the right of    5
17    6  to the right of   10
18    7   to the left of   16
19    9  to the right of    1
20    9   to the left of   21
21   10  to the right of   23
22   10   to the left of    6
23   11  to the right of    2
24   11  to the right of    4
25   12  to the right of   13
26   13  to the right of   14
27   13  to the right of   18
28   13   to the left of   12
29   14   to the left of   13
30   14  to the right of   18
31   15   to the left of    0
32   16  to the right of    7
33   16  to the right of    3
34   17   to the left of    2
35   18   to the left of   13
36   18   to the left of   14
37   21  to the right of    1
38   21  to the right of    9
39   22  to the right of    0
40   23   to the left of   10
41   23   to the left of    5