Egg that is very spectacular like that! It makes me thinking which picture could assemble like that

Relating the bitmaps so far were not my big friends in animation because of the size, but I should be more open as for example this tutorial from 2007 explains http://www.xara.com/news/september07/tutorial.asp that possible even recolor a bitmap between of frames. And the size is not so criminal

Bitmap_color_change.swf



Bitmap_color_change.xar