Hello, I am very curious of how I could create a system where it reacts with whats currently playing. Pretty much what I want is a light that turns on and off according to whats being played (For example, a loud beat happens and the light flickers off)
Can you show your script where it selects the sound? I might be able to help you and add those lines that you need 
Otherwise, you could do a function of those lights flickers off and do something like this:
game.Workspace.LoudBeatEpic:Play()
lightfunction()
It’s quite easy.
I used the PlaybackLoudness of the sound in my game to make a gradient move up and down.
The link will show you an example of how to use it.