What is the color of the triangular flower?
The flower is purple.
    src        edge_attr  dst
0     1  to the right of    2
1     1           behind    4
2     1   to the left of    3
3     2   to the left of    6
4     2   to the left of    1
5     3  to the right of    1
6     3  to the right of    7
7     3   to the left of    5
8     3  to the right of    4
9     4   to the left of    7
10    4   to the left of    3
11    4      in front of    1
12    4               in    6
13    5  to the right of    6
14    5  to the right of    3
15    6   to the left of    5
16    6  to the right of    2
17    7               in    6
18    7  to the right of    4
19    7   to the left of    3