On the evening of august 13th 2019, i was standing at the end of my driveway watching bats swoop in and out between the trees. it was after 10:00pm on a dark, clear, windless night. i noticed a bright white light suddenly pulse above the trees almost directly over the top of me. the pulse was a flash of white light with defined, square edges that went down to the ground. the light went out and i followed an undistinguishable grey shape move above me heading from approx. 240 degrees to 060 degrees in a straight line. the light was perhaps 30ft. above tree level. the light then moved slowly east, pulsing every 5-10 seconds. i took out my iphone, selected video, held the phone above my head and started to blindly record in the hopes of catching something. the recording captures the pulsing light - and then multiple small lights or objects fluttering up and around the object previously overhead of me. my first impression was that it was a drone doing survey's. however, i have operated drones (i have a commercial (cpl/ir) and remote pilot's license) and this object was not displaying any navigation lights or visual night tracking aids usually associated with drone operations. it wasn't until i heard a story of a similar incident in the uk sometime during the 1980's and on reviewing the video that i thought this might be a credible sighting.