Amber objects in formation then breaking formation for several quick moves then back to formation.

I don't remember the exact date it could have been 1992 or 1993.  I remember it was very warm that night,  so I would say it was late spring or early summer.  I walked out of my apartment to go to work.  I was looking east.  I noticed the sky was very clear and you could see all the stars perfectly, so naturally I was looking at the sky as I walked to my car.  I noticed a group of three lights come over the hill.  To those that know the area it seemed like they were about over Fancher Heights.  It seemed like they were pretty high.  They glowed what I call amber or orange like in color.  Having seen many planes fly over I'd say there speed was a lot faster than a plane.   Planes  take what seems like a full minute to go from horizon to horizon these or this took about  6 to 8 seconds. I say this because I don't know if it was one craft or three.  They flew in a perfect triangle shaped pattern all the way across the sky flying west.   When they got over the Saddle Rock horizon line they all of the sudden separated and then darted in and out and around each other.  Then just as quickly they formed the triangle shape they were in originally and kept going west over the hill.  What made me post this now in 2010 is a picture and video I just saw of the Phoenix lights, because it looked just like them.  The objects made no sound at all.
Witness indicates that date of the sighting is approximate.  PD