My arm didn't come back Idk why?

I'm trying to make it so if you have any of your body parts off it will clone them back I just gave it a try with the right arm please help me fix this.

function onTouch(part)
    local Arm = script.Parent:FindFirstChild('Right arm')
    if Arm:Destroy = true then
        Arm:Clone()
    end
end
part.Touched:connect(onTouch)