Small solid white light with sudden movementsSmall light very bright not haloed like a star. It was a bright clear sky this afternoon and evening sun had not set yet. The light didn't move for about 15 seconds then suddenly and rapidly went to the side and seemed to go behind a cloud and did not reappear. About 20 minutes later I saw an identical light in the same general area moving rapidly in the opposite direction than previously (towards Elliot bay). Light was solid not flashing. I see planes and helicopters going and coming from seatac many times per hour and have not noticed anything with this type of appearance or movement pattern before.((NUFORC Note: Witness elects to remain totally anonymous; provides no contact information. PD))