Went outside to smoke and loked south east over denver to see 4 large glowing objects. As I watched them they were moving in a non linear motion. They were not synchronized but made large sweeping arcs in the sky in roughly 160 degree turns back and forth. At one point one object appeared to disappear for 3-5 seconds and then re-appeared. A different object did make a significant speed increase and then decrease as it appeared to speed off in one direction. Due to the nature of my location I was only able to observe about 30 seconds of this phenomenon. The objects continued in a south east direction behind obstructions in my view. Due to the short opportunity I had to observe these objects, I was unable to grab a phone or camera, but I did get to the best location I could to observe as much as I could.The objects appeared as bright fireball type things with large trails after them. Sort of like a shooting star but traveling at much slower speeds and appeared to be much larger than a shooting star. At first I wasn't sure if they were fireworks, but upon observing the motions I determined it could not be fireworks. From my location, this appeared to be somewhere either just south of downtown denver, or somewhere further south east maybe over centenial or aurora.