Is the wall different in color than the clock?
No, both the wall and the clock are blue.
    src        edge_attr  dst
0     0   to the left of    8
1     0  to the right of    6
2     0   to the left of    9
3     0  to the right of   10
4     0   to the left of    7
5     0   to the left of    3
6     0   to the left of   19
7     1   to the left of   19
8     1               on    4
9     3  to the right of   19
10    3  to the right of    0
11    3  to the right of    4
12    4   to the left of    3
13    4   to the left of    7
14    4  to the right of    6
15    5   to the left of   18
16    6   to the left of    4
17    6   to the left of    8
18    6   to the left of    0
19    7  to the right of    9
20    7  to the right of    0
21    7  to the right of    4
22    7  to the right of    8
23    7  to the right of   19
24    8  to the right of    0
25    8               on    4
26    8  to the right of    6
27    8   to the left of    7
28    9  to the right of    0
29    9               on    4
30    9  to the right of   10
31    9   to the left of    7
32   10   to the left of    0
33   10   to the left of    9
34   10               on    4
35   10               of    4
36   11               on    4
37   11  to the right of   14
38   11   to the left of   15
39   11  to the right of   17
40   13               on    4
41   13   to the left of   16
42   14               on    4
43   14   to the left of   11
44   14   to the left of   15
45   15  to the right of   14
46   15               of    4
47   15  to the right of   11
48   16  to the right of   13
49   16               on    4
50   17   to the left of   11
51   18  to the right of    5
52   19               on    4
53   19   to the left of    3
54   19   to the left of    7
55   19  to the right of    1
56   19  to the right of    0