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Popup window on home page

I’m designing a site for a medical practice that wants to inform anyone clicking on the homepage for the first time that the office is open during the pandemic and offering virtual visits. I want to have a popup window that opens only on the first visit to the page like this: https://www.anoptimalyou.com/

If returning to the homepage, the window does not open.

How would this be done in webflow? (I have very limited coding experience)


Here is my public share link: LINK
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