Document Classes ⇒ beamer | Clock in Presentation

[Serhiy]

Hello,

I use beamer class in latex in order to make presentation. I saw some time ago that it is possible to add small clock at the corner that shows on each slides the time spending for presentation.

I tried to use package tdclock, but it does not work. Does anyone know how I could insert a small clock in beamer presentation?

Serhiy