var target:MovieClip;
for ( var x=10; x < 320 ; x = x+20 ){
  for ( var y=10; y < 160; y = y+20){ 
	var newname="sensor"+i
	var mc_id = Math.floor( Math.random(10)*10 ) ;
	target.attachMovie("aqua",newname,i);
	target.newname._x = x;
	target.newname._y = y;
  }
}