Red lights forming stationary rectangular shape

Three sets of 2 red lights each light stacked on top of the other.  Visualize left to right two lights spaced evenly forming a rectangular shape.  The lights on the bottom stayed steady while those above flashed in Sequences.  The two outer sets were spaced further apart than the set in the middle.  They stayed about 10 degrees above horizon.  Going 16 miles north on rutledge pike them looking south they appear to be SSE.  It is nearly midnight and they are still in same location.