Game prototype involving shape drawing and a ball

drawing = false;
angle = Math.random()*360;
speed = 5;
precision = 16;
xspeed = speed*Math.cos(angle*0.0174532925);
yspeed = speed*Math.sin(angle*0.0174532925);
_root.createEmptyMovieClip("drawclip", 1);
_root.attachMovie("ball", "ball", 2, {_x:250, _y:200});
_root.onMouseDown = function() {
	x_points = new Array();
	y_points = new Array();
	drawing = true;
	drawclip.clear();
	still_inside = true;
	drawclip.lineStyle(5, 0x000000);
	x_points.push(_root._xmouse);
	y_points.push(_root._ymouse);
	drawclip.moveTo(x_points[0], y_points[0]);
};
_root.onMouseUp = function() {
	drawing = false;
};
_root.onMouseMove = function() {
	if (drawing) {
		end_x = _root._xmouse;
		end_y = _root._ymouse;
		dist_x = x_points[0]-end_x;
		dist_y = y_points[0]-end_y;
		dist = dist_x*dist_x+dist_y*dist_y;
		if (dist>400) {
			still_inside = false;
			drawclip.lineTo(end_x, end_y);
			x_points.push(end_x);
			y_points.push(end_y);
		} else {
			if (still_inside) {
				drawclip.lineTo(end_x, end_y);
				x_points.push(end_x);
				y_points.push(end_y);
			} else {
				x_points.push(x_points[0]);
				y_points.push(y_points[0]);
				drawclip.lineTo(x_points[0], y_points[0]);
				drawing = false;
				drawclip.clear();
				drawclip.lineStyle(5, 0x00ff00);
				drawclip.beginFill(0x00ff00, 30);
				drawclip.moveTo(x_points[0], y_points[0]);
				for (x=1; x<x_points.length; x++) {
					drawclip.lineTo(x_points[x], y_points[x]);
				}
				if (drawclip.hitTest(ball._x, ball._y, true)) {
					ball._x = 250;
					ball._y = 200;
				}
			}
		}
	}
};
ball.onEnterFrame = function() {
	this._x += xspeed;
	this._y += yspeed;
	if ((this._x<10) or (this._x>490)) {
		xspeed *= -1;
	}
	if ((this._y<10) or (this._y>390)) {
		yspeed *= -1;
	}
};
_root.onEnterFrame = function() {
	if (drawing) {
		for (x=1; x<precision; x++) {
			spot_x = ball._x+10*Math.sin(x*360/precision*0.0174532925);
			spot_y = ball._y+10*Math.cos(x*360/precision*0.0174532925);
			if (drawclip.hitTest(spot_x, spot_y, true)) {
				drawing = false;
				drawclip.clear();
				break;
			}
		}
	}
};