Saw 3 red dots in the formation of a triangle that were slowly moving, independent of each other, then disappeared.

I was looking across the field that’s in front of my house, and right above the mountain range (Appalachian mountains) were 3 red dots that appeared to be in the formation of a large triangle. The lights were moving slowly and independently of each other. I quickly went back inside to grab my mom to show. By the time we went back outside (only a minute later) one of the lights was gone. We watched the last 2 lights slowly move and then fade away, possibly as result of there being heavy fog and clouds rolling in. In total it lasted maybe 10 minutes or so. We had tried to take a video, but couldn’t capture it in time. I am 24 years old and frequently observe the sky and like to take pictures of the moon and stars, but I’ve never seen anything like this before. The map image included shows exactly where we were standing. The small red dots indicate roughly where I saw the lights.