How to SYNC animated material with Blueprint animation?

Hey ,
I have included my files for you to look at if you have time. I just want the speed to control the invisible boxes that are being generated while also controlling the animated material so they sync.
https://www.dropbox/sh/01paifqex735uuy/AABnxLLW7IA8FJq9TylXk1Oga?dl=0