A small circular craft with rotating lights around its center

When I was just 4 years old I witnessed an incredible UFO.  After everyone in my family was asleep, I woke up and got out of bed, left our first floor apartment, through the front door, and entered my neighbors apartment, across the hall.  Their door was unlocked, as was normal in the seventies.  I walked over to their balcony door, opened it and stood there for a moment, just staring outside.  There was an empty lot between the apartment I was in and the next row of homes, which spanned approximately 100 meters.  It wasn't long before the UFO appeared over the lot, traveling  perpendicularly to my position, just above the rooftops, at about 10 kilometers per hour.  It stopped directly across from me for about 1 minute and then resumed its movement, until I was unable to see it an longer.  It had soft,  multicolored lights rotating around it's center, blinking in unison. I believe it was metallic and about the size of a car.  I do not remember hearing anything stra! nge or out of the ordinary while watching the UFO.  After it left, I closed the balcony door, and returned to my apartment, without waking my parents.  I can still remember the experience vividly.
Witness indicates that the date of the sighting is approximate.  PD