Rena, do a search for XU mouse. It will set your mouse to click every 5 seconds (Lowest setting) and keep going till you stop it. I use it for the freeroll (I scored less then 8K this moring) everytime when I go out to have a smoke.
Works great, but be WARNED, there's 2 choices, one is for randomly moving the mouse, the other choice is for clicking the mouse. Good luck!