Which color is the floor?
The floor is blue.
    src        edge_attr  dst
0     1          holding   15
1     3   to the left of    6
2     4   to the left of   15
3     4   to the left of   10
4     5               on   11
5     6  to the right of    3
6     7               of    1
7     8   to the left of   15
8     9   to the left of   10
9    10  to the right of    4
10   10  to the right of   13
11   10  to the right of    9
12   13   to the left of   10
13   13   to the left of   15
14   15  to the right of   13
15   15  to the right of    4
16   15  to the right of    8