How do you Loop a particle system/event?

Greetings!
I’m attemting to create a scene involving firework that fires off forever/infinitely using the assets provided and from this video:
UE4 Blueprint + Cascade Fireworks GPU Particle EXTRAVAGANZA!

I want the end result to look like in the video during view port editing, for reasons the play simulation is unstable for me.
However I couldn’t figure out how to create a loop of the firework like in the video due to lack of experience with the blueprint/event system. After hours of failing, I end up breaking the blueprint…
The video description has a UE4 Project containing all the files for the firework, I just not sure how to use it properly.
Any help is appreciated, if you do not wish to download the UE4 files I’d provide stitched up screenie of the blueprints.

Thank you!