Desktop clock program?

I don’t use the taskbar (if you don’t know what I’m talking about, look to the bottom of the screen to find a grey/blue/black bar).

I use Object dock instead. Object Dock does not have a clock on it, and I don’t really want a dinky little clock on my dock anyway. The only thing I need is a desktop wallpaper that changes every minute with the time (synchronizing with the system clock).

I realize that this would have to come in the form a delegate program to change the wallpaper. Does anyone know of such a program to change the clock, preferably packaged with appropriate wallpapers for all the times of a digital clock readout?