How do I make this killbrick toggleable so it can be insta-kill or not?

How do I make is so that the killbrick can be either insta-kill or not via a bool value? I tried to do this several times but the killbrick does not kill the player or the player takes non-instant kill damage. Is there any way I can do something like this?

Note: non instant kill means that the player takes damage but the player isnt killed instantly.

local Debounce = false

for _,v in pairs(script.Parent:GetChildren()) do
	if v:IsA("BasePart") then
		v.Touched:Connect(function(hit) 
			if Debounce == false then
			Debounce = true
			local Player = hit.Parent:FindFirstChild("Humanoid")
				if Player then
					Player.Health = Player.Health - 30
					wait(0.5)
					Debounce = false
				end
			end
		end)
        end
end

Thanks for reading!

I'd like to address a couple of things before fixing your script.

the player takes non-instant kill damage

Player.Health = Player.Health - 30

Your debounce and this part taking the player's health by 30 is the reason why it's not instant killing.

if Debounce == false then

You can also use if not Debounce then. Nothing lost or gained, just slightly more convinient but it's preference.

local Player = hit.Parent:FindFirstChild("Humanoid")
                if Player then

That isn't the Player but the Players Character's Humanoid object. For future reference don't get the triple mixed PLEASE.

Now you can use BoolValue totoggle it.

BoolValue has 2 possible values, true and false. You can check whether it's either of those and continue the code depending if the value meets your criteria.

I've fixed the things that I address above and added an example pseudo toggle here:

local Debounce = false
local Toggle = BoolValue.Value --lets say its true, meaning the bricks kills

for _,v in pairs(script.Parent:GetChildren()) do
	if v:IsA("BasePart") then
		v.Touched:Connect(function(hit) 
			if Toggle and not Debounce then
				Debounce = true
				local Humanoid = hit.Parent:FindFirstChild("Humanoid")
				if Humanoid then
					Humanoid.Health == 0
					wait(0.5)
					Debounce = false
				end
			end
		end)
	end
end