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How to create scroll function that circles through the same content repeatedly (example inside)

Hi everyone, I’m in the design phase (pre-build), so I don’t have a website to reference. I am wondering how to create the scroll function in this website ( Specifically, I want to create a website where all the nav/logo elements are locked and the content scrolls infinitely through the same projects over and over so that when the user reaches the last project, the first project is shown. Thanks in advance for all your help.