What is the color of the packet?
The packet is white.
    src        edge_attr  dst
0     1   to the left of    2
1     2        on top of    0
2     2  to the right of    3
3     2  to the right of    1
4     3   to the left of    9
5     3   to the left of    4
6     3   to the left of    2
7     4  to the right of    3
8     5               on    6
9     5   to the left of    7
10    5  to the right of    8
11    6             with    7
12    6               on    0
13    6               on   10
14    7               on    6
15    7  to the right of    5
16    7  to the right of    8
17    8   to the left of    5
18    8   to the left of    7
19    9        on top of    6
20    9  to the right of    3
21    9               on    6