Creating Timeout Messages

I am new to the development game and I am creating a Roku Channel for our church but I am trying to figure out what code I should created in the roOneLineDialog component so that when the live stream is not active and a specified time interval is reached it will display a message letting the individual know we are currently not streaming.

According to Roku I can make sure a message appear programmatically after the live stream times out after a specified interval but I do know how and can't find any example.