Need help with 3 Questions!

Hi,

I've been asking for a while 3. 1. I would like to create animated waterfalls that trigger a trigger (so if the boat is in this case it goes out) my 2nd question: I would also like to create a projection of a ship with a projector that is also on And goes out using a trigger. And my last (3rd) question: I would like to create a fog effect with the fog machine that also goes on and off with a trigger. Can someone help me? Or someone who knows scripts for that? thank you in advance!