Annoying backgrounds

[sheatwin2]

I'm a veteran and I can full combo most of the for masters only songs and some of the for gurus only songs. But I still can't full combo party 4 u holy nights only because of that ridiculous blue background that flashes and changes every 5 seconds. I literally can't see any of the arrows going by. Can anyone help me out with a way to disable the background or make it easier to see.