How do I make my biped mobs use bow just as player does?

I would like to make my mob use a bow just like player does, with player-like animation and arrow being that 2-polygon model with particles etc.

Example of what I would like to see as the result is what skeleton does - it has a cooldown, its arrows are arrows and not simple images, it actually pulls the bow and not just creates arrows out of nowhere. I am ready to do some coding as long as it is understandable for a person, who does not know Java.