Stuck with the friend generator

Hi I'm trying to get the friend generator to trigger when a player gets close to it. The problem is I have done a logic connection to the friend generator but once it is triggered it just keeps going and I end up with loads of duplicate townspeople. How do I make it just trigger the one time with the townsperson?

With a logic gate. Example:

Player Entered Trigger Area-> Input on logic gate

Logic gate output -> friend generator to generate

Then to make sure it happens ONCE you send a signal from the generator back to the gate to close it

Generated -> Close on logic gate

So the player enters. The gate fires once and then is closed. Won't fire again until either the box is reloaded or you reset the logic gate

Thanks this helped a lot didn't even know about the logic gate