[silin]

перерисовать весь массив (по enterFrame например)

var tol=20;
var path=[];
function onMouseUp(){
	var dx=_xmouse-path[0].x,dy=_ymouse-path[0].y;
	if(Math.sqrt(dx*dx+dy*dy)<tol){
		delete this.onEnterFrame;
		clear();
		moveTo(_xmouse,_ymouse);
		beginFill(0xFF0000);
		lineStyle(0,0x00FF00);
		for(var i=0;i<path.length;i++)lineTo(path[i].x,path[i].y);
		endFill();
	}
	path.push({x:_xmouse,y:_ymouse});
}
function onEnterFrame(){
		clear();
		lineStyle(0);
		moveTo(path[0].x,path[0].y);
		for(var i=1;i<path.length;i++)lineTo(path[i].x,path[i].y);
		if(path.length) lineTo(_xmouse,_ymouse);
}