Is the color of the sky different than the color of the fence?
No, both the sky and the fence are white.
    src        edge_attr  dst
0     0  to the right of    4
1     0  to the right of    2
2     0  to the right of    9
3     2  to the right of    5
4     2  to the right of    8
5     2  to the right of    7
6     2   to the left of    0
7     2            above    6
8     4  to the right of    7
9     4   to the left of    0
10    5   to the left of    2
11    5   to the left of    9
12    6             near    7
13    7          next to    6
14    7   to the left of    2
15    7   to the left of    4
16    7   to the left of    9
17    8   to the left of    2
18    8   to the left of    9
19    9   to the left of    0
20    9  to the right of    5
21    9  to the right of    7
22    9  to the right of    8