Very dark gray craft heading west on a direct path. Object appeared to turn into 3 shapes, and then back into one solid object again. Very hard to describe. It was moving quickly west. Seemed to pulse and change shape with regular intervals. Object appeared to have a circular force field around it almost like heat distortion in a transparent circle around it. The circle of distorted air shifted and was not there the entire time. It was completely silent. No lights, no sound. Object was mesmerizing. Object looked very complex, no reflection, not "metallic" looking. Flat and almost back. Morphing 3 objects and then into one solid straight line, over and over as it flew by overhead.