3 large lights above the clouds, that did not move for 5 mins

Went out on my patio tonight to have a puff. I observed looking east above the mountain range, and what seemed above a low cloud deck a beam of light, with 2 other lights below it in the shape of a triangle. At first I thought it was a commercial jet or a few jets with there lights on moving through the clouds. Although after watching for about 2mins the lights did not move. At this point I grabbed my daughter to come out and see. We watched for about another 3 mins. Whatever we saw did not move. I would estimate maybe about 20000ft. No sound, no aviation blinking lights and again no movement. All of a sudden top light flashed out, 10 secs later bottom right flashed out, 10 sec after that bottom light flashed out! And was gone and back to normal skies WEIRDEST. I have a video of the event, but says it's to large..reach out if you want it.