Saw circular object with red green and blue lights slowly floating about hundred ft above trees from east to west until it passed the trees and out of sight. Object was significant size. Can't remember if it was blinking or not.

Honked the horn at my sister who was driving her car in front of my car at a stop sign at the top  of the hill on the road that goes from Fife to Milton.  She drove off leaving myself alone with the Ufo.  
I rolled my drivers side window down, but could not hear a sound.  I was fearful yet curious and stayed there until it completely passed over the trees.  I wish I would've known about this network at the time of the sighting.  
I was sixteen years old.  On that day my family and I were moving from Shasta Lake CA and arrived at my sister's apartment which was the location of the sighting.  The most strangest thing I've ever seen in my lifetime.  
I can't recall the date since it's been so long but I know for sure it was in June of 93 at about 2 am.  
The reason I write now is to find out if anyone else had similiar sightings in the same time frame and maybe the same location?
Witness indicates that date is approximate.  PD