Was on the phone and letting dogs outside into back yard , Time 10:08 noticed snow or hail type pelletts bouceing off house , trees and deck , caught one and it evaported . Thought it was frost on trees being disturbed by birds or squirrles but no frost in tree ,that is when I noticed large blue white or pale gray white cylander passing slowly and then saw the another abt l mile behind the first in same path . When both cylanders were in complete view the later one blink a large bright white light then the one in front responded with the same one blink on then off ,the light appeard to have a curve to it like a lens, bothe continued westerly in same path one behind the other then shot off to SW and out of sight .