My girlfriend and I were driving on our way home from her parents house just as it was nightfall. There was a good view of Venus and Saturn so I was keeping an eye out the window. About 500M from our driveway I took one last look at noticed 4 orange lights. I could figure out what they were. I first thought there were maybe fireworks, then maybe lights on an antenna tower. they were in a vertical line to our North west just above the horizon. The second light to the bottom looked to be more west than the other three. They disappeared behind a building and when we passed it they were now more in a square formation. I told my girlfriend to pull over so I could show her, we pulled into our driveway and got out. There were 3 now, I wasn't watching for maybe 10-15 seconds. The three now were in a triangle formation slowly heading east right over the hi way. My girlfriend went back to get her camera and as she grabbed it from the car they disappeared behind a cloud. We have both worked at the airport for 10 years and know what planes look like at night. It was not a plane. It was too low and too slow to be a satellite. I have no idea what it was.