Менять координату при движении мыши

var mouseL: Object = new Object();
_root.createEmptyMovieClip("draw_mc",0)
 
 
    mouseL.onMouseMove = function() {
        draw_mc.clear();
        draw_mc.lineStyle(7,0xFF0066,70);
        a=0.7*_xmouse+y1;
        draw_mc.moveTo(x1,y1);
        draw_mc.lineTo(x1,y1+a);        
        //draw_mc.width=0.7*_xmouse+y1;
    };
 
Mouse.addListener(mouseL);

var draw_mc:Shape = new Shape();
addChild(draw_mc);
addEventLisener(Event.ENTER_FARME, onUpdate);
//////////////
function onUpdate(e:Event):void{//а далее, в общем, все тоже самое
   draw_mc.clear();
   draw_mc.lineStyle(7,0xFF0066,70);
   a=0.7*_xmouse+y1;
   draw_mc.moveTo(x1,y1);
   draw_mc.lineTo(x1,y1+a);
}

var x1,y1,xSt,ySt:int;
xSt = Stage.width;
ySt = Stage.height;
var a:int=0.1*xSt;
x1=0.1*xSt;
y1=0.1*ySt;
var draw_mc:Shape = new Shape();
addChild(draw_mc);
addEventLisener(Event.ENTER_FARME, onUpdate);
function onUpdate(e:Event):void{
        draw_mc.clear();
        draw_mc.lineStyle(7,0xFF0066,70);
        a=0.7*_xmouse+y1;
        draw_mc.moveTo(x1,y1);
        draw_mc.lineTo(x1,y1+a);
        draw_mc.lineTo(x1+a,y1+a);
        draw_mc.lineTo(x1+a,y1);
        draw_mc.lineTo(x1,y1);
}