import flash.display.*;

var points:uint = 20;
var angleOffset:uint = 0;
var innerRadius:uint = 256;
var outerRadius:uint = 128;
var starX:uint = stage.stageWidth/2;
var starY:uint = stage.stageHeight/2;
var canvas:Shape = new Shape();
var g:Graphics = canvas.graphics;
addChild(canvas);

g.beginFill(0xFF0000);

if (points > 2) {
	var step, halfStep, start, n, dx, dy;
	
	// Calculate distance between points.
	step = (Math.PI*2)/points;
	halfStep = step/2;
	
	// Calculate starting angle in radians
	start = (angleOffset / 180) * Math.PI;
	g.moveTo(starX+(Math.cos(start)*outerRadius), starY-(Math.sin(start)*outerRadius));
	
	// Draw lines
	for (n=1; n<=points; n++) {
		dx = starX+Math.cos(start+(step*n)-halfStep)*innerRadius;
		dy = starY-Math.sin(start+(step*n)-halfStep)*innerRadius;
		trace("drawing to " + dx + "," + dy);
		g.lineTo(dx, dy);
		dx = starX+Math.cos(start+(step*n))*outerRadius;
		dy = starY-Math.sin(start+(step*n))*outerRadius;
		trace("drawing to " + dx + "," + dy);
		g.lineTo(dx, dy);
	}
}

// butts.