Polar express ( quick nickname between friends)

At sunset, I immediately noticed that a small glob of clouds had gathered. (Cirrus). Less than a minute later, they are cube shaped small craft loosely locking amid each other's gravitational field or training indicative of terrestrial military. Loosely resembling a 3 1 3 Tetris shape. Then every few seconds it stretched and the cubes multiplied until 43 total craft that made up the body of the larger craft. It began to accelerate, no com trail or visual exhaust plume. It had the movement of a train and was a wonderful blue hue. Hence the name polar express. After it's departure we had at least 100 separate smaller sightings, they were closer...some passed over head no more than 20 feet above us. Black glibe "searchers", wibbly wobbly drunk e.t craft. There were at least 25 of these, with 1 being more innovative and "serious" looking and acting in it's movement. Light shows, full horizon color change, spot lights and even collision. But no noise, or wing was ever attributed to these craft.