Restrict Navigation

In reference to this article,  Does anyone know if there is a way to restrict how long a user stays on a page if there is no interaction and no audio.  In other words, nothing to use as a trigger to make my next button appear.  I tried adjusting the length of the timeline and the button never appeared, even after the amount of time that I set on the timeline.  If anyone has a solution, it would be greatly appreciated.  Thanks.

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