need help smart counter

Wand that when a metal ball get trough the id finder that the three displays count one than two and so on don't know how to do that ^^

There you go boy. Counts a Quadrilion balls

Bonus: Heartbeat monitor toy for Biological education sometimes (Disclaimer, I'm not a human doctor! I am IT expert in the future! Made because I just this*!)

* justlikesomethingelseheartbeat!!!especiallythatheartbeatcontent!heywhydoyouevenreadthistext!?I'membarassedIspoiledit!:(