Fix element while scrolling

Hello everyone,

I am trying to make an element (the tablet image) fixed when it appears in a view and also want to show some more elements while the user scrolls throughout the section so the whole section looks like it is fixed.

Here is my test page:

And what I am trying to achieve is similar to the animation in ix2 with the iPhone:

Does anyone have an idea how to achieve it?

Thanks for any help,

Here is my public share link: LINK
(how to access public share link)