Triangular-shaped UFO spotted over Sandy Springs, USA

On March 10, 2016, a witness was somewhere in Sandy Springs (in Georgia, USA) when he has spotted three weird lights in shape of triangle. Shortly after, this UFO has changed color before to disappear.

Witness statement:

As I got off of work in Sandy Springs I went to my usual bus stop. Myself and a couple of other people kept hearing a low humming noise so when we looked up we saw 3 red lights in the shape of a triangle. At first I thought it was one of those airplane towers but then the lights turned green which I've never seen before. After a few seconds of it still sitting in the same spot it started to slowly move to the right a few feet then proceeded to shoot off at an extremely fast speed. I took a picture of it with my phone after the lights turned green but unfortunately the camera on my phone isn't very good but it is proof the I saw something.