How to move mouse to corner automatically ? -- improve the wiki code.

I found on Awesome wiki has a tip for move mouse to corner.

But I hope to improve it, when mouse has not been used by a time. Then Awesome 
do it automatically.

Here is my code. But "Question", I do not know how to detect mouse's status, and 
how long mouse has been slept.

    local saftCoords = {x=1920, y=1080}
    local moveMouseOnStartup = true -- tell Awesome to do this at startup
    local function moveMouse(x_co, y_co)
        mouse.coords({ x=x_co, y=y_co })
    end

    if moveMouseOnStartup then
        moveMouse(saftCoords.x, saftCoords.y)
    end

    -- TODO when mouse sleep for a time, then automatically move to corner.
    mousetimer = timer({ timeout = 60*1 })
    mousetimer:add_signal("timeout", function()

        moveMouse(saftCoords.x, saftCoords.y)

    end)
    mousetimer:start()

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