Do the cord and the wall have a different colors?
No, both the cord and the wall are white.
    src        edge_attr  dst
0     0  to the right of    7
1     0   to the left of    2
2     2  to the right of    7
3     2  to the right of    3
4     2  to the right of   12
5     2   to the left of    9
6     2  to the right of    0
7     3   to the left of    2
8     3   to the left of    6
9     3  to the right of    7
10    4   to the left of   14
11    5  to the right of   11
12    5   to the left of    8
13    5   to the left of   14
14    6  to the right of    3
15    7   to the left of    0
16    7   to the left of    2
17    7   to the left of    3
18    7   to the left of   12
19    8  to the right of    5
20    9  to the right of    2
21   10   to the left of   11
22   11   to the left of   14
23   11  to the right of   10
24   11   to the left of    5
25   12   to the left of   14
26   12  to the right of    7
27   12   to the left of    2
28   14  to the right of   12
29   14  to the right of    5
30   14  to the right of    4
31   14  to the right of   11