Can anyone spot an error in my closing door script?

local door = game.Workspace.SlideDoor
local position = door.Position
Y =  223.2

function closing()
    while Y >= 207.75 do
        wait(0.01)
        Y = Y - 0.05
        position = CFrame.new(position.X,Y,position.Z)
        print(Y)
    end
end

script.Parent.ClickDetector.MouseClick:connect(closing)

I want the door to go down but it looks like something is wrong. Door wont move, but in the output i get correct number Y.