light following a grid

I was about eight years old, we lived in Maynardville at the time. We came to Knoxville to get groceries. I spotted the white light high over the TN/VA sky, or so it seems. At first glance it looked like a dancing star, it looked as if it was on a grid. I mean ninety degree angles without slowing down or speeding up. My mother also saw it. I am convinced if such technology existed as it seems beyond what we have seen so far, including stealth. We would be utilizing it by now. It covered hundreds of miles in split seconds. I am 36 now and nothing so far comes close. I know what I saw, just don't know what it was.