I was driving home when I noticed 4 yellowish white lights (like the landing lights on planes) The 4 lights kept going, and after I went further down the road I parked. Right above me was a flying triangle. I noted that the triangle had a light at each corner, and a red light in the middle. The yellow-white lights flashed every second or so, and the red lights on the top and bottom flashed in between the yellow flash pattern. I live in an active flight pattern and see multiple 747's and 737's and helicopters, but this was different. The triangle continued across the sky, but I managed to take some photos with my cell camera. Not the best quality, but I got a photo. The triangle continued across the sky, silently. Normally with any plane or helicopter there is a sound of a jet engine or a propeller, but I heard nothing. I kept looking at it until it flew into the tree line. I'm convinced it's terrestrial, because it was flying like the B-2 spirit, but I could defiantly see a grey equilateral triangle against the black sky. The only thing that doesn't make sense is that where I am, not even half a mile there is interstate 76, and I live in a densely populated area. Lockheed Martin does have some buildings about 1-2 miles from where I was, but this was the first time I saw anything like this.