How can I get the object to actually change transparency?

I have this script but it never becomes transparent, how can I fix this?

    wait (5)
    game.Workspace.Rocket_launch:Play()
while wait(0.01) do
    script.Parent.Position = script.Parent.Position + Vector3.new(0,2,0)
    end
    wait(25)
        script.Parent.Transparency = 1
end)