How to spawn infinite objects

I’m making a futuristic city with flying cars.
How can I spawn car objects repeatedly that are flying in a straight line.
In a 3d program you make a emitter and attach objects to a particle but how to do that in UE4.

I’m new to UE4, so I’m not a expert in blueprints.

I saw this movie, and I think its what I need
Can someone help me?

Thanks in advance