Algodoo

29 marbles (30 if it wernet for magenta)
go through a looping course trying to avoid Magenta, who kills.
(Note. Marbles die by hitting the blade of Magenta's knife.)
Comment on who do you think the next killer should be
If a marbles in the red zone, that means it could be in danger
You can also put follow off Magenta and put it on your marble.
I HAZ KNIVE