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