web page screensaver

I have several hundred thousand animated gifs and I wonder if I could put say a dozen or so on each web page of html format and if I could build up say 30 or 40 pages, all different, using some of them? I know there are some websites out there than can take a number of pages, (although I don't know in what formats) and build a slideshow with them, to make up a unique screen saver? I just wonder if this would be an easy way to make up unique, animated screen savers and what it might cost to do that? If it sounds viable, I could quickly build a couple of sample pages, to test the idea, if that would be helpful here? Perhaps a web page might not be the best way to go? Please advise me here ? Derek... UK