Show a page section when site is loaded initially ONLY

Site URL: https://cylinder-caterpillar-z2k2.squarespace.com/

https://cylinder-caterpillar-z2k2.squarespace.com/ (password: date123)

I have created a "splash" page effect at the top of the home page on this 7.1 site. The client wants it only to display the first time the home page is viewed in a visit. So when the visitor is on a different page and then clicks the logo they want the splash page still hidden.

How do I differentiate between initial load and subsequent loadings of the home page?