ActionScript 1/2 :: Drawing Program In Flash?

I have a small flash that I'd like to expand upon, and basically I'm wondering if it's possible to Make a button that lets you erase things on click, rather than clearing the screen.Draw lines of different colours/thicknessHave the Flash output a code for the drawing (similar to Punk-o-Matic 1/2) and be able to put it into the Flash in a text form to have it output the picture. (Thus allowing sharing of pictures).Here's the code.
 
// 1. SETTING THINGS_root.createEmptyMovieClip("line",1);
// 2. EVENTS IN _ROOT:_root.onMouseDown = function(){ line.moveTo(_xmouse,_ymouse); line.lineStyle(2,0x000000,100); this.onMouseMove = function(){  line.lineTo(_xmouse,_ymouse);  updateAfterEvent(); }}_root.onMouseUp = function(){ this.onMouseMove = null;}

Also see included .fla. It's very small as all it features is a default stage that you can draw on, with an Erase button that clears the screen.