Auto-Scroll to next anchor on Mouse-wheel movement

In this project,

Is there way to pin an object to the bottom of the viewport (like a Brand logo or such that needs to be fixed on the screen at the bottom) so that, in spite movement between Symbol 1 through 4, the object remains pinned 50 px from bottom of the screen? I tried doing this but each time the element takes the bottom of Symbol 4 as the bottom instead of the bottom of the viewport.

I am trying to combine the function of this:

applied to the auto-scrolling web pages here!

Thanks,

Hyper