Help - Area matching

Hello Everybody…
want to design a simple game in which a user should fill color in an irregular shape (say some text or a cloud) and when he fills it completely, trigger another movie… my basic problem can be divided in two parts:

  1. How to let player fill in the color (on mouse over)
  2. How to test that the player has filled the area completely with a given brush settings.

I am a newbie in scripting and any help would certainly be valuable to me…
Thanx in advance…

Anshul