3 green fast moving lights

Incident was a very long time ago but I have had for sightings in my life and I just wanted to record them somewhere.
A friend and I were hitchhiking on a highway in Colorado with not very much traffic far from a town of any real size at around 10:00 pm.  The stars in the sky were very visible being that we were far from the lights of a town. We saw three green lights at what seemed like satellite orbit distance. Both of us having seen satellites many times knew what they looked like knew what we were seeing were not sats.  They were close together in a straight line. After seeing them for about 20 seconds the two on the outside sped away at about 45 degree angles from the one in the center at an extraordinary speed with the one in the middle staying on the original track also at the same high rate of speed.
Having seen sats.and military jets before we knew that is not what they were. No blinking lights either.
Witness indicates that the date of the sighting is approximate.  PD