This is a paragraph or multiple paragraphs that will fit on a given size screen display, assuming that the window is open full. That could be a condition in the script. This will not allow scrolling but give the opportunity for the user to click the button and see the next text grouping.

This is the second text grouping. This could be specific information, instructions, documentation of news. The content is not important here; it is the presentation of it that we are pushing. We are giving a move forward button and a move back button.

This is the third grouping. Again it is not the specifics of the content, though it could be grouped like that. This also presents a move forward and move back.

This is the last grouping of text. What group it is is not important; only that it is the last of X groups.

Do not put a button on the last section; your page is done, the user can't go any farther.

You could always add a button to reload the page: