Three lights in triangular formation too far apart to be any conventional aircraft.Was walking my dog on Squires Way Drive in Chesterfield. I noticed a group of three lights in a triangular formation. The lights were too far apart to be a single craft--my guess would be they were about the length of three widebody airplanes apart.The lights stayed in formation for a few minutes, then changed to a perfectly horizontal line. They then returned to the triangular formation and stayed there for several more minutes before the left light disappeared.The remaining two lights stayed in a linear formation for another 30 seconds or so before the right light also disappeared. The center light still remained as I turned to leave the scene.I did see some conventional aircraft heading toward the lights immediately after they disappeared.I attempted to video the phenomenon, but street lights in the area were too bright to capture any worthwhile video.