This is my 3rd. time seeing these UFOs chasing each other and in the same direction...blinking from silver to red and then to blue. No sounds at all just going at a rather high speed. Tonight they moved in the usual direction without noise and through the clouds and then they both were gone!!They started out at the same angle which was about 45 degrees going lower to tree top heightand then they just disappeared into tin air.One evening 3 weeks ago I saw 5 of the same objects...2 chasing each other a single one and then 2 more chasing again....going all into the same direction and then just poof and they were gone.At all sightings the round objects were doing the same color changes. But they were moving faster than an airplane or anything else I've ever seen.The time of night 3 weeks ago were 9ish and the rest were around 11pm...but not lasting for more than a couple of seconds. All summer long we have been watching a single UFO in the sky to the Southwest and it would move back and forth but always tree top high. My husband has seen that one but not the chasing ones.I've always looked at the stars but more so this year.You see I have breast to Bone cancer and have bee fighting it for seven years and I just love watching the stars and whatever might be out there. These objects have been wonderful to see! I am not affraid of any of this! I feel very special to have seen all of it!!