How to create a Landingpage Flowchart like this?

I'm wondering whether anyone could tell me how I can create a flowchart like the one below in Wordpress / HTML.

buzzoid com (You have to scroll down a bit)

I'm thankful for any advice!

Thanks for your answer. I'm not looking for the theme itself. Just the part with the flowchart. Did you notice that it chances size as you scale the window?

I'd love to have some kind of similar chart on my own page. I searched on Google and on this board whether I could find any guidlines or tutorials. Or a way how to copy it. Unfortunately, I coundn't find anything.

Please let me know if anyone has any advice.