What you can do is have the presentation loop continuously until you press Esc on your keyboard. To accomplish all this, go to the Ribbon under tab Slide Show and choose „Setup Show”. Choose „Loop Continuously Until Esc”. Make sure the option „Advance slides” is on „Using timings, if present”. To have the presentation running, first select all the slides and under the tab Animations in the section Transition to this Slide set the advance to next slide automatically and edit the seconds it needs to advance to the next slide.