Triangle shaped craft sighted in Chicago sky making unnatural movements.Tonight I walked outside to smoke a cigarette on my front porch. It's a very clear night right now. I looked off to the southern sky and noticed what I thought must be a satellite.I have lived near ohare airport for most of my life, this was absolutely not any type of airplane. The light had a reddish rusty tinge to it. It appeared to be slowly moving towards the west, in a steady motion. After roughly 30 seconds of observation it immediately changed its direction. I was very startled and got an immediate rush of fear.This object then appeared to sway back and forth in a slow steady way. I got the feeling I was being watched. This object then stopped movement for a good 5 min. I ran inside to grab my phone to take a picture. I was inside for less than a min and when I returned I noticed the object had changed position. The object was too far up to get any good pictures. I then noticed that there was three distinct edges that had very dim lighting on them. By now this object was almost above me, there were two closely placed lights that seemed to be on the underside of the object.I had another strong rush of fear and feeling it knew it had been spotted. The craft then moved in arc like path beck towards the west and behind the tree line out of my sight.