Was letting dogs out. Saw the triangle emerge from a cloud watched in awe as it moved erratically in several directions. It then pointed upward and to the North and disappeared behind another cloud. There was no sound. Nothing else in the sky could be seen. The lights were light "running lights" around the edges and two rear circular lights. I was disappointed it did not last longer in view. It appeared purposeful in its movements although erratic. I was afraid I may be seen as it was dark and I had turned on all the lights and standing on my porch with the dogs.