Accessing Stage from the Class

programming flash
1

I got the following file Tiles.as


package{
    
    import flash.display.*;

    public class Tiles extends MovieClip{
       
        public var map:MovieClip = new MovieClip();
        
        private var stageSet:Stage;
        public function Tiles(stageRef:Stage):void{
            stageSet = stageRef;
        }
        /* i draw on map MC with drawing API and i want it to be shown on Stage (main frame), but i cant access it*/
        public function createMap():void{
            map.graphics.lineStyle(1,0x990000);
            map.graphics.moveTo(0,0);
            map.graphics.lineTo(100,100);
            stageSet.addChild(map);
        }
    }
}

and following code in Tiles.fla


var Tile:Tiles = new Tiles(Stage);
Tile.createMap();

and i get error like this :1067: Implicit coercion of a value of type Class to an unrelated type flash.display:Stage.