Seperate small white lights flew around eachother randlomly then formed a triangle formation and flew towards the moon eclipse.

My brother, his friend and I were watching a moon eclipse.  The moon was in the east south sky.  To the right of the moon, we saw what we thought were stars, suddenly jumble about like flies flying around each other.
The points of light flew into a triangle formation with the point pointing at the moon, and flew off towards the moon at great speed.  The entire triangle flew as one unit, but before the lights made the formation they flew as independant objects.
Again - the individual U.F.o's looked like stars.
Date is approximate.  PD