Individual round white spots (moon size) forming three circle formations; outer circle appr. 25 spots, next inner circle appr. 15 and centre 4 spots; total formation rotated alternative in left and right directionWhen leaving the car to enter the house the observer noticed some movement in the night sky. The total formation as discribed in the above summary followed the movement of the observer which was quiet scary because the observer was going back and forth to the car not really knowing where to go while the formation followed the observer's movement. After entering the house the observer went on the balcony to check whether the object was still around. The formation was indeed there right over the house. The distance was hard to judge but moving clouds were sometimes covering the formation. The outer cirle had at least a diameter of double armlength and the individual white spots had appr. the size of a full moon. The next circle of white spots had appr. half size of the outer one. The centre circle comprised 4 spots close to each other. The whole formation was rotating like a rolling wheel to the right - stopped after one full circle rotation and was than rotating to the left. These movements where continuesly going on for about 15 minutes. At the end all white spots were moving to the centre forming a big white spot (appr. two time the size of the moon) and where rapidly flying away.