Want I need is that infinite scroll works in all post on my website

Hands on with the iPhone 7 Plus’ new Portrait mode

Mark Ronson & Bruno Mars’ ‘Uptown Funk’ Certified Diamond

Infinite scroll could show related post or the post that are in navigation bar

This is an external example of what I want:

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Remember that I can share the user and password of my wordpress, so you can check it closer, with my promise to buy pro version and donation
Please Help me