Black hollow triangle with 3 red lights.

I clearly saw a black hollow triangle shaped jet or space craft with 3 red lights at each point moving very slowly maybe doing a survey.. the object had no middle to it or it was invisible through the middle. I could clearly see the sky and clouds straight through it, but right above was a triangle with 3 lights at each point slowly moving through the sky it disappeared into the clouds I suppose it went higher but I waited 20 minutes waiting for it and couldn't see it anymore for sure.