How do I single particles system?

Sorry for my english.

I created an IA enemy. And and how an attack has a particles system. I put the function one-shot. But being an IA enemy, he continually shoots the particles system. I would only want to shoot one. And after 3 seconds, shoot another one.

How can I do?

Add instance variable for your enemy that is the state of your enemy.

After it shoots particle, you will switch that variable to another number.

Then you can shoot another type of bullet.

Example :

0: shoot particle

1: shoot bullet X

And your particle must set Type to ONE-SHOT