What is on the post that looks gray and black?
The clock is on the post.
    src        edge_attr  dst
0     0   to the left of    8
1     1  to the right of    2
2     1   to the left of    8
3     1  to the right of    3
4     2  to the right of    3
5     2   to the left of    1
6     2   to the left of    8
7     2   to the left of    6
8     3   to the left of    2
9     3   to the left of    1
10    4   to the left of    8
11    5   to the left of    8
12    6  to the right of    2
13    7   to the left of    8
14    8  to the right of    1
15    8  to the right of    2
16    8  to the right of    4
17    8  to the right of    5
18    8  to the right of    7
19    8  to the right of   11
20    8  to the right of    0
21   10  to the right of   11
22   11   to the left of    8
23   11   to the left of   10
24   11               on    2
25   11               of    2