How can i make my pawn shoot?

I made a flying shoot game just like Galaxian.
This is my pawn’s blueprint,and it’s a enemy pawn.
I wanna make this pawn can shoot bullet automatically.
How can i make this come true?
Does i need to create a function about shoot , then i come to event graph to add some event?
Can someone descibe some step for me ?

You want Them to shoot continuously at a given frequence? Have a Look at

And WTF Is? Set Timer in Unreal Engine 4 ( UE4 ) - YouTube

The linked series from Mathew in YouTube ist awesome for beginners and intermediates, He hast plenty of very good explanations in His channel