I was exercising on my trampoline and then i spotted a large triangle shape over the mountains with 5 brightly light lights and a darkish body. It seemed to be about 6 airplanes size and it seemed to just hang in the sky suspended and then suddenly it vanished. it DID NOT fly over the mountains because i was stationary at the time and was staring at it intently trying to identify a man made aircraft. this aircraft did not have airplane characteristics because it did not make a sound, it did not leave a jet stream in the sky, and it did not have any visible wings. the sighting lasted about 8 seconds. i felt nervous and excited after this experience and then hopped on this computer and reported it.