Is the camera gray or maybe red?
The camera is gray.
    src        edge_attr  dst
0     0             with    4
1     0  to the right of    8
2     1  to the right of    8
3     2  to the right of    3
4     2  to the right of    8
5     3   to the left of    2
6     3   to the left of    6
7     3   to the left of   11
8     5   to the left of    9
9     5   to the left of    7
10    5   to the left of   10
11    6  to the right of    3
12    6  to the right of    8
13    7  to the right of    5
14    8   to the left of    2
15    8   to the left of    1
16    8   to the left of    6
17    8   to the left of   11
18    8   to the left of    0
19    9  to the right of    5
20   10  to the right of    5
21   11  to the right of    3
22   11  to the right of    8