Craft swooped down fast & floated with bright white rotating lights & 2 beams of light darting around & on & off

The object seemed to drop straight down from high above the sky. It seemed closer to me at first, but as it slowly moved & rotated,& its lights began to rotate & flash, it became clear the object was massive & just seemed closer. Each large bright white light rotated in various directions. It had 2 beams of light that darted around downward & turned on & off. After about 20 minutes, it began to lift up farther into the sky & then swooped upward. It then shot straight up into the sky towards the atmosphere & disappeared.