Triangle shaped object that stopped moving and held still above houses for about 2 seconds.

It was at night and I saw a large movement with bright lights outside. It was a large triangle shape with very bright, icy white lights, all the same size, not blinking. One light was at the tip and the others along the side. I couldn’t tell if there was anything in the center of this because it was too dark. It literally froze in place for 2 seconds and then went down toward the river very quickly and completely out of view. There was no noise, no other lights of any color and the lights on this did not blink light lights on planes do. Plus this thing was quite big.