triangle lights in the sky put on a laser light show, hovering over city.

I've been wanting to tell this event for a long time, we lived on the corner of 13th and F streets in downtown. across the street from our apartment was a vacant lot where I would walk my dog and let him re-leave himself.  
I had walked him over to the lot and he went, my two son's where in the apartment, my youngest was 2 years old and my oldest was 15 years old.  
As I was headed back across the street to go home, I don't know what made me look up? maybe it was something my dog did, but I did, I looked up.  It was one of those nights where the fog was sitting just above the tops of the buildings, not on the ground.  
There in the fog I saw lights in the shape of a triangle, hovering just above me in the fog.  The triangle was large maybe about 10 ft per side.  I ran back in the house with the dog and told my oldest son to come out with me fast so he could see it, we left the dog in the house and went back down to the street.  
The triangle light was still there, we stood there n the middle of the crosswalk staring up at the sky.  For the next several minutes we watched what is somewhat difficult to describe, other than it reminded me of something you might see when dealing with special effects on television, (computers now), but that's not how I would have described it then.  
The triangle divided itself in half smoothly without a break in the light, into two triangles, always touching at some point, as they seemed to roll along the others side, before dividing again turning into three then four, almost dancing off of each other.  The lights where bright blues and reds, always changing. It was like watching nothing I have ever seen from anything that I know could be in the sky.  
Standing there fixated on these lights, we heard some neighbors come out of the apartment just a few doors down on F street, seeing us standing there staring up into the sky, we heard them laugh and say something to the matter of, "what the hell are they doing?"
I turned my head and looked at them, there were two people there, and at that point they had looked up, the next thing I heard was, " Holly ((word deleted))," as they too saw the lights in the sky, and then out of no where the lights vanished and it stopped.  
The strangest thing about this event, was years later my youngest son when he was somewhere between 8 to 11 years old, told me he remembered as an infant being visited by what he would later know as aliens.   
Having very vivid memory's myself as early as 2 years of age about just life, normal stuff, I am inclined to believe him.
Witness indicates that the date of the event is approximate.  PD