Pulse v7 — Turbine butterfly
Two shaded wings pinch at a glowing yellow X and beat against each other — the pinwheel cut down to a single scissoring pair of blades.
An hourglass of two shaded wings, one above and one below, pinches at a glowing yellow X. Instead of turning, the pair beats — the wings scissor open and closed against each other.
Two blade angles half a turn apart would trace the same diameter, but the rocking term now includes each blade's own angle, so the two copies swing in opposite phases — a scissor pair rather than a rigid star. Everything else — the shrinking stack, the drift, the slow hue roll — is inherited from the parent turbine.
