...Each show in the sequence is set under Slide Settings so that mouse clicks do not advance the slides. This is important. ImpressShowRunner launches each show in the sequence and then clicks the mouse every few seconds and when the last black screen is shown, the mouse click terminates the show and Impress exits. ImpressShowRunner notices the process exit and then starts the next show. When the last show ends, ImpressShowRunner just starts the list again.
This complicated process gets around the fact that LibreOffice Impress apparently has no options or scripting features available to accomplish chaining and looping of multiple slide shows together.
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