Triangle of lights flashing red and green. It didn’t look like the airplanes I normally see - the triangle had more points of light

A triangle of lights, flashing red and green. All lights in the triangle shape would flash red, then green, rather than some flash red then some flash green. I live near an airport so I see the airplanes landing normally, but this seemed different. There was no sound, and the shape/pattern of the lights was like an equidistant triangle, rather than lights on just the wings and tail that i am used to seeing with the commercial airplanes. Normally when something flies that low there is a sound, but in this case I could not hear anything. Perhaps it was bigger and flying higher? However the size was quite large, if it was flying high it must have been big.