Are the wall and the box the same color?
No, the wall is green and the box is white.
    src        edge_attr  dst
0     1               on    0
1     1   to the left of   11
2     2   to the left of    8
3     2   to the left of    7
4     2   to the left of    5
5     5  to the right of    2
6     5   to the left of    9
7     6   to the left of   10
8     7  to the right of    2
9     8   to the left of    9
10    8  to the right of    2
11    9  to the right of    8
12    9  to the right of    5
13   10  to the right of    6
14   11  to the right of    1
15   11   to the left of   12
16   12  to the right of   11