Invention on Instagram: "The 1967 Ford Thunderbird used a clever electromechanical system to create its signature sequential tail light effect. Instead of relying on modern electronics, it used a small motor that turned a set of cams. As the cams rotated they opened and closed electrical contacts in a timed order. This allowed the three bulbs on each side to illuminate in sequence every time the driver activated the turn signal. This system worked because the rotating cams essentially acted as a