I probably don't know anything but... isn't this custom made? Why didn't you make it end at the same point it begins? That's like the one thing I'm looking for with these animated wallpapers...

@imperfectn: Well why are you using avast? That's not really a good antivirus software, other antiviruses are more trustworthy and have better functionality. If you haven't already, you should try it again with a different antivirus and observe what happens