Black Triangle Sighting in Biddeford, Maine on 2017-11-12 20:05:00 – Large, quiet craft with red and green lights flying over biddeford/saco

This is my second sighting in a few months. this time there were 2 other witnesses. the craft flew right over us and was very quiet. i noticed a triangle shape and my girlfriend said it was a hexagon. bright red and green lights that blinked sometimes, but not a steady pattern. it was flying pretty low, about 400-500 ft above and was very quiet. when it passed us we ran upstairs to our attic apartment and watched it travel east down the saco river, when it stated moving up and down really fast. in the distance we thought we seen it beam a light down as well. it proceeded to fly north towards old orchard beach. this is the same craft i witnessed a few months ago, this time i got a much better view of it. it was definitely not a plane, helo, or drone.