Potentiometer module

ReturnMoney: takes lever side, returns money amount
	local variables: current money level, current voltage
	if lever side == LEFT_LEVER
		read current voltage 
		convert current voltage to current money level
	if lever side == RIGHT_LEVER
		read current voltage 
		convert current voltage to current money level
	return current money level

CheckLeverReset: takes lever side, returns whether lever is reset
	local variables: lever reset = 0 (not reset), current money
	if lever side == LEFT_LEVER
		current money = ReturnMoney(LEFT_LEVER)
		if current money < LEFT_LEVER_RESET
			lever reset = 1
	if lever side == LEFT_LEVER
		current money = ReturnMoney(LEFT_LEVER)
		if current money < LEFT_LEVER_RESET
			lever reset = 1
	return lever reset