Problems overwriting Attribute/Walkspeed

[Arche_Overlord (Arche)]

For a long time, either when working on a combat system or literally anything else, I’ve wondered how to be able to stop a function that is meant to change a certain value after a time. I found the following post from someone that somewhat has my problem:

Overwriting value issues

The way my game works is once the player’s hit it will set their speed to 5 then wait(.5) and set it back. The problem is that if you hit a player the 2nd time the 1st hit will finish waiting .5 seconds and revert it to 16 anyways. This is a problem for me, because players can walk right out of combo hits. If anyone can find the solution to this issue I would be grateful. I know it has something to do with checking, but I don’t know how to go about doing this.

The first answer to the post is something I can put into practice, but when I actually tried I failed. Example of what I’m looking for:

local value = 1

function ChangeValue()
      task.wait(2)
      value = 2
end)

function ChangeValue2()
       task.wait(4)
       value = 1
end)

ChangeValue() -- Let's say I run my function meant to overwrite the variable 'value', but then if a condition is met, I change my mind and for example, I decide that I wanna make the wait between changing the value longer, how would I be able to stop the wait of the function and never actually set my variable to two? 

If number == 1 then
      ChangeValue2()
end

This code example isn’t optimal to explain my point, since I this isn’t a hard problem to come out with a solution for, but is when I want to make the player unable to walk if they’re stunned or it is when I wanna change an attribute after a certain time. I know I must use coroutines, but how would I apply that to what I want? I don’t want the code for it, I just want an explanation how to do it (Since I don’t fully understand coroutines even after researching about it for 3 days I fail to put into practice what I learned and what I understood from the post I addressed earlier)

[Arche_Overlord (Arche)]

To better explain what I want:

function Framework:Add()
    local Humanoid = ...
    Humanoid:SetAttribute("Value", Humanoid:GetAttribute("Value") + 1)

	if Humanoid:GetAttribute("Value") > 99 then
		spawn(function()
      -- Here I should find a way to yield the coroutine I had created on the example function			
			Humanoid.WalkSpeed = 10
			Humanoid.JumpPower = 0
			task.wait(2.5)
			Humanoid.WalkSpeed = 16
			Humanoid.JumpPower = 50
		end)
	end
end

function Framework:Example()
     coroutine.wrap(function()
            task.wait(2)
            Humanoid:SetAttribute("Value", 1)
     end)()

     self:Add()
end

Now, how can I make the coroutine I just created on the example function “global” so that the function add can just remotely yield it to stop the wait from setting my value to 1 if the attribute is bigger than 99, which is not exactly what I’m looking for.

[Arche_Overlord (Arche)]

Welp… it was as simple as using coroutine.create instead of .wrap in order to be able to close the coroutine…