A corridor of identical metal gate rings threaded onto a single axis and repeated to infinity — the same ring folded into an endless run by domain repetition rather than built. The camera cruises down the centre while a pulse of light punches through from front to back, firing each ring in turn as it overtakes them and racing off toward the vanishing point; every ring shudders, its radius trembling, in the instant the pulse crosses it, so the whole tunnel ripples with travelling ignition. Brushed metal in shadow, hot cyan-white where the pulse lands. Hover to lean the heading, scroll to throttle the cruise, and press to over-drive the pulse train.