public function onMouseMove(event:MouseEvent):void {
     graphics.clear();
     graphics.lineStyle(1, 0, 1);
     graphics.moveTo(sprite1.x, sprite1.y);
     graphics.lineTo(mouseX, mouseY);
     var dx:Number = sprite1.x - mouseX;
     var dy:Number = sprite1.y - mouseY;
     var dist:Number = Math.sqrt(dx * dx + dy * dy);
     textField.text = dist.toString();
    }
   }
  }