Black Triangle Sighting in Oceanside, New York on 2017-07-29 21:14:00 - 3 lights forming a perfect triangle traveled north to south over my backyard.

3 lights forming a triangle traveled north to south (out to the ocean) above myself and 3 other witnesses who were sitting in my backyard at 9:14 pm on saturday, july 29th. the 3 orbs were completely silent and one of the witnesses saw a 4th light following the 3 in triangle formation. in the video, you can see a plane so hopefully that gives a reference point to the speed and altitude of the lights. when i saved the video to my desktop, it came out sideways. i didn't want mufon or anyone else to think that i tampered with or manipulated the video in any way so i have uploaded the video as-is. feel free to rotate the video. the original video was shot on my iphone. let me know what you think it is! i posted the video to facebook and some people thought it was either (a) drones or (b) chinese lanterns. i had no way of calculating speed or altitude but if the lights are moving fast enough, that may rule out both a and b above. feel free to reach out with any questions and i'll try to be as helpful as i can. thanks, ryan