How to subtracting two attributes and display it on a gui?

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#1

Im trying to display damage done by a rock In my game to and object. The health attribute is not changing. Both the attributes are integers.

local db = true

script.Parent.Touched:Connect(function(hit)
	if hit.Name == "Handle" and db == true then
		db = false
		local health =  script.Parent:GetAttribute("Health")
		local damage = hit:GetAttribute("Damage")
		health = health - damage
		script.Parent.Gui.hp.Text = script.Parent:GetAttribute("Health")
		wait(.7)
		db = true
	end
end)

I have tried using .Value after each one and I’m getting errors.

#2

I believe this is like getting the text in a variable like this local text = script.Parent.Text and trying to change it like this text = "Text" so, change the attributes like this:

local db = true

script.Parent.Touched:Connect(function(hit)
	if hit.Name == "Handle" and db == true then
		db = false
		local health =  script.Parent
		local damage = hit:GetAttribute("Damage")
		health:GetAttribute("Health") = health:GetAttribute("Health") - damage
		script.Parent.Gui.hp.Text = script.Parent:GetAttribute("Health")
		wait(.7)
		db = true
	end
end)