Black triangle with red lights

The sighting was sometime in the Fall season, after 10pm but before midnight. I was getting out of the car with a friend, upon getting out I noticed bright red lights (about 8 of them) in a "V" pattern slowly moving through the sky almost directly above me. I could vaguely make out a black structure directly behind the lights (I can't remember if it was a "V" shape as well or a solid triangle, it was hard to make out against the dark sky). I watched them for about 15 seconds before they quickly disappeared. I looked over at my friend and asked if she had seen "that". She said yes, and I asked her what she saw. She told me she saw a bunch of red lights, in the same "V" shape I had seen. If you cut a triangle shape out of a standard piece of printer paper, it was about that size from our perspective. We were both really unsettled for the rest of the night