Adding points on click

Another beginner on AS3,

Recently started with a school project where I volunteered to do the scripting of (supposed to be) a simple game.
The game: Animals make noises, by clicking on the right animal (associated with the noise such as a bark)you can make them stop. You need to get 8 animals right in 10 seconds (for sample). If you get that right a “win” animation starts, if you don’t a “lose” animation starts.

My problems:

-Randomizing sounds within a set time limit.
-Click the right object a that time to get a point.

I searched the internet but in most cases I need to combine several scripts which has ended up wrong.