How To Trigger An Event Or Action After X Number Of Clicks

I am making a matching game on powerpoint for my course (however there aren't any real matches so it should be easier to create).
I have set animations and triggers so that when each shape is clicked it will grow. I want it to then reset after 2 selections as the user will have attempted a 'match' and will need to try again.
I think this should be possible using VBA, however my coding skills are virtually non-existent and I can't find any similar examples.
Could anyone help me please?
Many thanks,
BK

Can you post a sample, and tell us what you expect to happen on which event.

I have a number of shapes on one slide, on trigger each of them are set to grow.
However after 2 shapes have been selected by the user (any 2 shapes) I would like the slide to reset or the shapes to shrink back to original size.
It will not let me attach my powerpoint