how would i make it so while a bool is true, the tool waits 5 and then activates?

basically, i'm trying to make it so when a bool value is true, it waits 5 seconds and then continues what the tool was going to do, but when its false, it instantly breaks and stops what it was going to do, but i just cant figure it out, it either does it instantly or doesn't do it at all, instead of waiting 5 and then doing it and breaking, any fixes? this is my code

holding.Changed:Connect(function()
	if holding.Value == true then		
			for i = 0, 5 do
				if holding.Changed then
					print("ended prematuraly")
					return
				else
					print("healing in progress")
					wait(1)
				end
			end
		end

after all the ends the "if holding.Value == true then" continues and heals the player

The way i'd probably go about it is a loop like this

local bool = Instance.new("BoolValue") -- whatever bool you are tracking
local wasFalse = bool.Value -- temporary value

for i=1,5 do
	wait(1)
	wasFalse = wasFalse and bool.Value
end

if wasFalse then
	-- your healing code
end

The way this works is if bool is true then wasFalse is just set to true, but if bool is false wasFalse gets set to false. Since wasFalse is now false it cannot be true again because we use an and statement.

Of coarse one problem is that if the value is set to false in between checks then it wont register, you can fix this by increasing the check interval.

Couldn't think of a good way to explain it, im happy to answer any questions.