I was laying down on a sidewalk near a lake, looking at the sky with three friends of mine. I noticed 4 faded/dim red-orange lights flying across the sky. At first I thought it was a comet, because of the coloring, but it wouldn't make sense for 4 of them to travel right next to each other traveling in the same direction. I was so surprised and confused what it was. I hit my friend laying next to me, saying "do you guys see those lights?! What are those?" but two of them were distracted by something else. The one next to me asked where. I pointed to it, showing the line it was traveling across the sky. It was was traveling too fast though and fading into the clouds. At the very end, the lights started rotating around one another changing into a different shape. Then it disappeared. My friend was mad he missed it. The whole duration was about 5-10 seconds. I feel slightly crazy having seen it, because no one else saw it and I don't believe in UFO's.