Toggle move mouse to center of the screen

; Toggle move mouse to center of screen
F13::
    lastX := curX, lastY := curY
    MouseGetPos, curX, curY
    cenX := A_ScreenWidth/2
    cenY := A_ScreenHeight/2
    if (curX == cenX and curY == cenY)
    {
        tarX := lastX, tarY := lastY
    }
    else
    {
        tarX := cenX, tarY := cenY
    }
    MouseMove, tarX, tarY
return