Spectrum colored lights move across the sky and from them emerges a white light.

In October of 1993 I was walking from the Library Building towards Rhine Hall on the campus of Cincinnati Bible College and as I looked up and towards my left (which meant I was looking towards the Ohio River and the Northern KY area)  I saw a UFO.  
I saw what appeared to be the seven colors of the spectrum emerge from nowhere and briefly move across the sky southwestward in a pattern that I can only liken to a chalkboard line maker moving across a chalkboard.  If you were in grade school in the 1970’s and 1980’s as I was you may remember your teacher placing chalk in several wire holders attached to a piece of wood she would use to make lines on a chalkboard.  Imagine the colors of the spectrum being drawn on a chalkboard and that is basically what I saw.
The colored lines emerged from nowhere and briefly moved across the sky and then abruptly stopped.   From them shot a bright white light that moved across the sky in a southwestwardly direction.  The whole sighting took a couple of seconds at the most.
Date in October 1992 is approximate.  PD