I was in house, heard noise like far away train,as sound got louder, could fell vibration in air. Went outside looked up and a low flying craft shaped like a elongated stopsign, 4 coloed lround lights on each end, on sides, long white lighs.Could see different panels some sunken in, some protruding, craft flew very slow,about 5 minutes passed the humm and vibration picked up volume and zip! it was gone!