Stargazing, 3 orbs appeared and were playing with an X formation, circling and shooting off and back

Initially one craft was observed, the singular craft glided from one point to another whilst being observed. No noise, no trails, just a bright light slightly dimmer than the stars, it was joined by another after moving a fair distance, same type of glow, size, speed. They performed an X in the air, circling each other and doing an X again. They vanished after 10 minutes of observation. The third craft was lone and appeared after a few minutes had passed since its companions had gone. This craft was the exact same but performed high speed maneuvers. Stopping dead in the sky and changing direction before firing off into the North West. Crafts were smooth, Dark metal grey only visible whilst moving and their lights shimmered slightly. Seemed to react to reactions of observers.