How to make my website like this

There is a website that I liked and it uses oceanwp and wanted to make my website like it but couldn’t know what demo he uses
I can’t share the website link because it’s available only in my country but I madea short video for it
https://www15.zippyshare.com/v/1pfbUVV4/file.html

when you scroll down you will see new elements
not like the demo that I’m using right now
https://megagym.oceanwp.org/
so how can I do it?

The page I need help with: [log in to see the link]