xmas animated card - improve transition

hi, attached is an animated gif of an xmas ecard. we need this done asap by today. They feel current cloud looks a bit amatuerish mainly due to the iconic look and the motion of the cloud and need a realistic animation of the clouds (ie: the clouds should either sweep/float across the screen OR form like clouds- from small to big?). pls suggest what you have in mind to make it look nicer. perhaps all white, fog like, then fading to reveal those 3 icons. End Format needs to be in gif. pls show samples if your animated stuff. pls do not quote too much for this as it shouldn't be too difficult for someone with the skills.