Foundation and Bootstrap have their Orbit and Carousel respectively, so we need something for Vanilla. The code is from W3schools, but it is not always so easy to use it as is, so some of the code had to be added into a html element. There are also bits of styling and js in the site manager's head and footer fields. More or less slides can be accommodated by duplicating or deleting some of the 'mySlides' containers.
To make a component of this slideshow, select the container called 'slideshow-wrapper'.