How Would i Duplicate a MC in V8 not 6

[this.Alex]

Hey im wondering how i would make this in action script v8 not v6 this is the v6 code i made my self =)
:

createEmptyMovieClip("square",i);
square.lineStyle(1,0x0,80);
square.beginFill(0x55FF,100);
square.lineTo(0,25);
square.lineTo(25,25);
square.lineTo(25,0);
square.lineTo(0,0);
square.endFill();
onEnterFrame=function(){
    Mouse.hide();
    onMouseMove=function(){
        i++;
        square.duplicateMovieClip("square"+i,i,{
                                  _x:_xmouse,
                                  _y:_ymouse
                                  })
    }
    square._visible=false;
} 

but i dont know how to do it in V8 flash V8 is not AS2 as well =).