A simple question on sprite or movie...

I simply draw a line using AS3 in flash environment. but i
used moveTo for center. but if i run this it is simply taking x,y
axis 0,0 and move around. I want to move this from center of the
stage. please help.



below is my code



var line:Sprite = new Sprite()

addChild(line);



var cx:Number = stage.stageWidth/2;

var cy:Number = stage.stageHeight/2;



var radius:Number = 1;

var increase:Number = 0;



line.graphics.lineStyle(1, 0xff00ff);



line.addEventListener(Event.ENTER_FRAME, onEnter);



function onEnter(event:Event):void

{

increase += radius;



//trace(increase);

//line.graphics.moveTo(cx, cy);

line.graphics.lineTo(cx + increase, cy + increase);

line.rotation += 0.1;

}