Increment / decrement /clear a counter

Inc :
Inc PB > Multiplier
Inc PB > Sample & Hold trigger
Value > Multiplier > S & H in

Dec :
Dec PB > Multiplier
Dec PB > S & H trigger
Value > CV invert > Multiplier > S & H in

Clr :
Dec PB > Multiplier
Dec PB > S & H trigger
S & H out > CV invert > Multiplier > S & H in

S & H out > S & H in

The Sample & Hold is set to track & hold : on