ok, so what i do is. draw lines (3 across 1 up) to make the cube. and i do about 3 pixels a frame (layer). so draw 3 pixels in one frame then duplicate layer, then draw three more then duplicate layer, the three more then duplicate layer ect. untill you have a square or sumfin like it. then you build up 3 at a time then you finish the cube (or whatever) and color it 3 at a time. then save the layerd psd, bring it to gimp and go to filters animation playback. if you want to save it, save it as a gif file