Approximately 21:30, August 13th, a family member told me to come outside, and I noticed several star sized objects started moving around. The location was in weld county, Colorado, USA, and lasted about 30 minutes. The objects flashed red green during the duration of the sighting, and near the end of it (the time I went inside), all but one of the objects had formed a line in the sky to the southwest of my house. The one object not part of the line continued to move about left to right, up and down, and in circles until I went inside. All the objects continued to flash red and green simultaneously