Solution

163438

First name
Benjamin
School
West Burton school
Country
Age
0

If you go first, colour in 2 petals so whether they colour in 1 or 2 petals, you can colour in the last one. If you are second there is a low chance you will win. There is a way to win though. If they colour in 1, you colour in 1, so they have no choice but to colour in 1 or 2, and not 3.