Making a Animation Editor with Unity

I have an idea about making an Animation Editor. It will have some basic movement like "high kick, swing arm, walk, jump, leap....". Users will combine these movements and make a dance. What can I use in unity to make this app?
About animation, can I use the "animator layer" for combining these movements? Or anything else?
Is there any tutorial about making the Editor part (add, delete like composing music)for that?
Thanks.