is there a better way to do this sort of thing?

[helpmeplz]

it seems so ineffecient...

	if (aTime>0) {
		aTime--;
	}
	if (dTime>0) {
		dTime--;
	}
	if (stamina<100) {
		stamina++;
	}
	if (stamina<0) {
		stamina = 0;
	}