Manual and/or Automatic?

I have developed a training that contains a "slide show" of sorts. I have a TV and remote. The user clicks through the slides (or screens) by clicking the forward or reverse button on the remote. This is controlled by a click action that increases or decreases my variable (depending on which button is clicked). The appropriate screen conditionally appears depending on the value of the variable. (Of course, I don't have flash - I'm building everything within Lectora)My issue is: I would like for the "slide show" to progress automatically if the user does not click the remote and I would still like the user to be able to regress one slide at a time at any point. Any ideas?