yeah, it's supposed to be an animated flash movieclip! You can create a simple swf in your flashMX and then embed it as movieclip in flashdevelop. Or if you don't mind learning, you can draw the animation states in a sprite-sheet and use the methods in flixel to import it and play the animation(though, that way the above code will have to be re-written from scratch). If you don't want to learn flixel and still want to use spritesheets, there are many tutorials out there on it, but to be specific, look for "bitmapData and scrollRect" tutorial for as3.