Help with Health Regen

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#1

So I am making a custom health regen system. I want it to regen if the player hasn’t taken damage in a couple seconds but if the player took damage, it will wait the regen time threshold until the cooldown has ended.

local character = script.Parent
local humanoid = character:WaitForChild("Humanoid")

local regenTimeThreshold = 3 -- Time in seconds before regeneration starts after taking damage
local regenCooldown = 1 -- Time in seconds to keep regenerating after regen starts
local regenRate = 20 -- Amount of health regenerated per second

local regenTimeThresholdTime = tick()
local regenCurrentTime = tick()

local oldHealth = humanoid.Health

local RunService = game:GetService("RunService")
local regenTimeThresholdConnection
local regenConnection

local function setRegenTimeThresholdConnectionNil()
	if regenTimeThresholdConnection then
		regenTimeThresholdConnection:Disconnect()
		regenTimeThresholdConnection = nil
	end
end

local function setRegenConnectionNil()
	if regenConnection then
		regenConnection:Disconnect()
		regenConnection = nil
	end
end

local function regen()
	regenConnection = RunService.Heartbeat:Connect(function(delta)
		if tick() - regenCurrentTime >= regenCooldown then
			regenCurrentTime = tick()
			humanoid.Health += regenRate
		end
	end)
end

humanoid:GetPropertyChangedSignal("Health"):Connect(function()
	if humanoid.Health < oldHealth then
		setRegenTimeThresholdConnectionNil()
		setRegenConnectionNil()
		oldHealth = humanoid.Health
		regenTimeThresholdTime = tick()
		regenCurrentTime = tick()

		regenTimeThresholdConnection = RunService.Heartbeat:Connect(function(delta)
			if tick() - regenTimeThresholdTime >= regenTimeThreshold then
				regenTimeThresholdTime = tick()
				regen()
				setRegenTimeThresholdConnectionNil()
			end
		end)
	end
end)

humanoid.Died:Connect(function()
	setRegenTimeThresholdConnectionNil()
	setRegenConnectionNil()
end)
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