5 horizontal lights dimming out then back in after shifting direction. Lights reappear in a loner line of them before igniting?

My husband and I were travel North on Route 26 near the town of Ava at approximately 5:15pm. Approaching the top of a small hill directly in front of us in the sky were 5 circular horizontal lights. They dimmed and there was a shift in direction of the craft (rotated?) before lights reappeared and the craft ignited? It started sparking and traveling East in a large ball of spark leaving a tail like a comet would in its wake before disappearing after 100 ft or so.