Spawning Randomly Different Objects

Hi,

If possible could someone tell me how to spawn two or three different objects .. one by one from one spawning object.

for example: if there is Zom1, Zom2 and Zom3 .. there is one door.. I want from that door .. sometimes Zom1 to get spawn sometimes Zom2 and sometimes Zom3 ...

Thank you...

1. Make 'Family' with Zom1,Zom2,Zom3..., name it "ZomFamily"

2. Action : Door / Spawn another object / select "ZomFamily"