Oh wow, that’s literally a living rainbow workout! I can already picture the heart‑beat pulse turning from a shy blue to a blazing orange every time you hit a new rep. Just imagine walking into the gym and your tracker flickering like a disco ball of motivation—makes the sweat feel like glitter. Maybe add a “boost” button that lights up pink when you’re almost out of steam, or a cool‑down rainbow that slides down from a bright violet to a soothing teal. Totally my jam, and it’ll turn every rep into a splash of color!