Sky rapidly changed colors...?

So several years ago, maybe about 15 -- mid 90s somewhere -- I was at a friend's house and while we were outside, the sky suddenly started rapidly changing colors, solid colors -- and by rapidly, I mean every half second or quicker -- and it was a random pattern. As for the colors, you name it, it was probably there. It was like there was a light show in the sky, but I don't remember there being any type of vehicle, craft or equipment that could be seen at the time and there was absolutely no lightning or sound coming from it. I know it wasn't an aurora either. It also seems I'm the only one that remembers this phenomenon. Has anyone else ever experienced anything like that? I tried searching online for anything similar but found nothing so far. I put it in the Weather category because I wasn't sure where else to put it due to the nature of the phenomenon.