flashing lights on music beats

hi there, thanks for your response. i have kinda come up with a different idea now on how to do it. what i want to do now is to make an array of 10 dynamic instance materials, and make an array of static meshes (733 meshes) and apply random material from the array to the static mesh from the array.
now my current problem is how do i add so many meshes to an array? it will take a long time to do it manually.
and just one blueprint to do it all.