Was driving down Nashville Road with my mother, south toward Springfield. Off to the left near a house we both saw three small orbs (about five feet across probably) in a line parallel to the road, about 75 feet off the ground. They were mostly red, but flickered and almost appeared to be on fire. Like fire balloons you see launched at festivals, but there was no string and nobody around who might have launched them. There was no noise that we could hear. The orbs were perfectly stationary as we drove past, until the one on the right suddenly moved toward the one on the middle in a straight line. I looked straight up at it and could see only more flickering, but the right one almost appeared to have an arrow underneath it pointing back toward town. Since I wasn't driving I couldn't force the car to stop - I finally got the driver to turn around about a half mile down the road. We turned around and drove back but the orbs were gone.The temperature was about 60 degrees, no wind. The night was perfectly clear. It wasn't really a frightening experience at all, just more "what the heck was that." It happened so quickly we didn't really realize what was happening until it was too late for photographs, unfortunately.