Glowing orange and white balls of light drifting steadily at different altitudes silently headed northwest from Brentwood, MO.I was driving south on brentwood blvd towards manchester rd when I looked up and saw what looked like the lights of a radio tower moving towards me from maplewood heading northwest. I pulled over to the side of the road and rolled down my window after stopping my car.I wanted to make sure they were not helicopters or planes or even balloons set aflame. They were totally silent and drifting in an upward spiral formation steadily and slowly. I looked closely as each light was at a different altitude. They were glowing orange and white.