And... How can i set the lights in the traffic light model?

I want run them in a specific moment (as the launch).

Help me!!!!! I've an another problem!!!
How can i set up the lights and the script on they in the traffic light mode??????

Thank you very Much!!!

I need a tutorial to create a traffic light script

Ok. Thank You.
My problem is: how can I create a script???

Ops...excuse me.
But...How i can create a Traffic Light on a roller coaster???

Hello! I'm new on this forum.
I wanted to ask you how can I create a script for a traffic light on my roller coasters.

Thank You!
Bye.