Are there one second screensavers?

my lcd tv (i use as a monitor) has screen burns and I dunno if they're reversible or not, screensaver is useless because i work all my waking hours so it would never come on. I wish there was some animation: a fat frog would slide thru the screen every hour, so that the background would change at least once an hour for one second... is there anything like this available out there, a one second screensaver that comes on every hour? any ideas? how to accomplish this. It should come and go immediately.