Jyst wait till u try automatically gradually slowing them. Waaayyyyy more addictive+relaxing
Its also kinda cool to do the same thing but accelerating gradually but (depending on the timeframe/duration) i can find it somewhat anxiety inducing. It definitely increases heart rate and blood pressure likely.
During the whole DOGE debacle, i kept hearing the Silph Co takeover theme from Pokemon Blue gradually speeding up. Like, i programmed it to do that in my app for that but i cant unhear it