Creating an Effect.

Hey guys,I am not sure where to put this thread, but I guess here, well, heres my question: i’m creating a small entity… and… When u shoot it, I want it to “use” my own effect, but how to make an custom effect? Can I have any links for a tutorial? Been searching around, but didnt find anything.
Help is appreciated, -Staneh

Something

Well, I still not really understand that…

Le bump fondue