My Keyboard Won't Light Up!!

I was messing around with the keyboard and I pressed the FN key and it turned off the lights to my keyboard but as I released, the lights came back on. I tried this a couple more times when my keyboard finally just didn't turn the lights back on. I looked it up and they said I need razor synapse but I'm on mac so I can't use razor synapse. Can someone please help because I just bought this keyboard like last week.