Classic "flying saucer" moving low and slow through condos in gated Ft. Lauderdale prestige golf community.

I lived on the 6th floor of a condominium in a gated, private golf community.  It had a balcony that faced (what I remember may be) Commercial Blvd. in Ft. Lauderdale.  I had gone out on the balconey (as was my habit) to watch a boyfriend drive out of the complex on his way home in the early morning hours.  It was a beautiful and clear night.  As I hung over the balconey watching for the boyfriend's tail-lights (which he'd tap to say goodbye), I heard a very low, throbbing sound to the back and right side of the building.  I had a good view of the space between the condos nearest me and I peered around the corner.  I saw a "craft", which I at first thought was some kind of advertising thing-- because lights were revolving around the mid-section slowly, like a marquee of some kind.  It also was bathed from the top and bottom by soft red and green light-- I cannot remember at this time which color was at the top or at the bottom, red or green. But those were the two colors.  As it moved between the buildings, very, very, slowly, I saw it was, well, a saucer.  An honest-to-God "flying saucer".  It was no more than 75 feet from me on the balcony. It was so close that I could see the "windows".
 It was dull, gray metallic looking and seamless.  It had a dome-shape on both top and underside.  It was well-proportioned. It had "windows" or "ports" encircling the middle circumference that revolved slowly.  I could not see into these "windows" as the light seemed to be opaque.  The "windows" were similar to, I guess, airliner windows; rounded at the corners, appearing to be slightly recessed.  The light was not bright, but not glowing, either, possibly a little bit "fuzzy".  They revolved slowly and clockwise.  The red and green glow(s) at the top and the undersurface pulsed, but only slightly.  The sound it made I have best described as a low "warbling" of two tones.
 I couldn't take my eyes off it, of course.  I was trying to believe what I was seeing.  It continued over the grounds moving south, and the thing that freaks me out to this day is that it started to follow the exact same road my boyfriend was traveling on out of the complex.  It was pretty much right behind him.  I thought, "He MUST be able to see this thing, it's right on his tail." This was BEFORE cell phones...
 I lost sight of the road out after a few minutes and couldn't figure out if the craft had left the area over the road, but I think it did as it got closer to what I THINK was Commercial Blvd.  At that point it quickly gained altitude, like pretty much straight up into the air.  It didn't go up slowly, but just popped up like a balloon on a string you let go of, and then took off quickly southwest.
 I called the Ft. Lauderdale police immediately and asked if anyone had reported a UFO in the area around Environ.  They simply said, "no".  I didn't make a report, I just said thanks and figured I'd read something in the paper the next day.  I didn't see anything reported, however.  I told my boyfriend the next day and he said he wasn't looking up and behind him, and didn't notice any lights other than his on the road.  But, the craft didn't have "beams" shining down on anything, anyway.  The road was fairly well-lit with those orang-y lights.  He believed me.  I'm a sober, logical, well-educated and intelligent person, not very excitable, either.
 I took the experience in stride.  I know I saw what looked like the classic "flying saucer", and that's as simple as it is.  I don't know if anyone else saw the same one I saw, but I can't believe I was the only person awake in a great big complex such as the one I lived in at the time.  This sighting was smack dab in the middle of an extremely well-populated and popular area.  It still makes me wonder why, if this was an extra-terrestrial craft, why it would chose to show itself so low to the ground and in a place where it could expect to be seen clearly if anyone looked out a window or was walking a dog.
 I've told other people in a matter-of-fact way exactly what I saw.  I never thought to find a website like this to report to until I finally got mad at the zillionith TV program about UFOs STILL with no explanation about similar sightings and went out to find a place to report my experience to add to all the others.  I'd like an explanation for what I saw, please.
Witness indicates that the date of the incident is approximate.  PD