I was at a Christmas Eve party and my friend went outside to say goodbye to his sisters, and then they all witnessed something in the sky and called for everyone to see. I ran outside and looked up to see 3 orange lights in a triangle shape, rather large, slowly moving. There were low clouds in the night sky and some of the lights were hidden behind clouds at times. 5 witnesses saw it and none of us knew what it was. It made no noise. Eventually after about a minute I got cold and decided to go inside, because the cloud cover increased and I could no longer see the 3 orange lights. It was unclear whether it was 3 different objects flying in a pattern, or 1 large triangular object.