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.