What color is the scrub brush on the right?
The scrub brush is white.
    src        edge_attr  dst
0     0   to the left of    6
1     0   to the left of    4
2     0   to the left of   12
3     4  to the right of    0
4     4  to the right of   10
5     5  to the right of   13
6     6  to the right of    0
7     7  to the right of   13
8     8               on    2
9     8   to the left of    9
10    8   to the left of   15
11    9  to the right of    8
12   10   to the left of    4
13   10               of    1
14   11  to the right of   13
15   12  to the right of    0
16   13   to the left of   11
17   13   to the left of    5
18   13   to the left of    7
19   13               of   14
20   15  to the right of    8