Mouse click is held down over object, click more than once?

I have a Menu item with 100 objects and I want to remove one object with every mouse click but how can I make it so if the mouse click is held down for 2 seconds it will start to automatically count down without having to keep clicking?

I'm not sure what exactly you want, but would something like starting a timer (timer-behaviour) work..

On object clicked

start timer for 2 seconds

on timer

set global variable to 1

on mouse button released

stop timer

set global variable to 0

global variable is 1

count down (I'm not sure what exactly you mean by automatically counting down)