UFO Sighting in Langley, Washington on 2017-07-29 21:55:00 - White orb lit the ground then followed by a greenish-blue orb fast moving, no sound

My usual routine that night was to take my dog out for his nightly relief. while waiting by the side of my house i was looking down at the ground when it lit up with a white light from above. i looked up just to see a white glowing orb zip by. within a micro second, a greenish-bluish orb followed close behind. they were fast moving and made absolutely no sound. i could not see where they flew since trees obstructed my line of sight. nothing else happened.