Why does my code show up as a error? i am confuse please help i am new to lua.

local Ready = true

script.Parent.LeverHandle.ClickDetector.MouseClick:Connect(function()

script.Parent.LeverHandle:Destroy()

script.Parent.LeverEnd:Destroy()

local Detecto = Instance.new("Part")

Detecto.Parent = game.Workspace

Detecto.Anchored = true

Detecto.CanCollide = false

Detecto.Size = Vector3.new(13.52, 8.4, 8.8)

Detecto.Position = Vector3.new(-4.63, 5.199, 87.737)

Detecto.Transparency = 1

Detecto.Name = "Detector"

end)

script.Parent.Parent.Detector.Touched:Connect(function(hit)

local H = hit.Parent:FindFirstChild("Humanoid")

if H ~= nil and Ready == true then

Ready = false

local plyr = game.Players:FindFirstChild(H.Parent.Name)

plyr.PlayerGui.Dialog.Backround.TextBox2.Text = "Run!"

wait(1.5)

plyr.PlayerGui.Dialog.Backround.TextBox2.Text = ""

end

end)

and the error show up like this "Detector is not a valid member of Workspace"