Why don't these variables update properly?

I have two variables, done and triggered. Both update momentarily as they are updated in the code, but immediately after they are reset. Any ideas on what's happening? I've already tried making them their own separate values, but the same thing happens.

local parPar = script.Parent.Parent

local posX = parPar.Position.X
local posY = parPar.Position.Y
local posZ = parPar.Position.Z

local done = false
local triggered = false

local function timer()
	wait(1.5)
	local done = true
end

script.Parent.Touched:connect(function(hit)
	if not triggered then
		if hit and hit.Parent and hit.Parent:FindFirstChild("Humanoid") then
			if hit.Name == "Head" or hit.Parent.ClassName == "Accessory" and hit.Parent.humanoid.Jump == true and triggered == false then
				local triggered = true
				parPar.CanCollide = false
				local head = hit.Parent.Head
				local headPosY = head.Position.Y
				while done == false do
					local oldHeadPosY = headPosY
					local headPosY = head.Position.Y
					local difference = headPosY - oldHeadPosY
					local sum = posY + difference
					parPar.Position = Vector3.new(posX, sum, posZ)
					wait()
				end
				parPar.Position = Vector3.new(posX, posY, posZ)
				parPar.CanCollide = true
			end
		end
	end
end)

EDIT: Forgot to mention that no errors come up in the output.