Does the floor have white color?
Yes, the floor is white.
   src        edge_attr  dst
0    0               on    4
1    0               on    1
2    0            above    1
3    1            under    0
4    1  to the right of    3
5    3   to the left of    6
6    3   to the left of    1
7    3               on    4
8    6  to the right of    3