Instead of update, I hit the publish button so now a partially modified website is showing. I want to take it down until all pages are completed. I tried making the pages 'private' but they can still be seen.
To change the visibility of a page/post, first you need to open the page in the editor and go to the Settings tab (Previous of the Widgets tab) on the left panel and find the 'Visibility' option in the Status and Visibility section, from here You can change the visibility status of the page.