How to make a back-to-top button using CSS and HTML only?

Question

What i\'m trying to do is kind of like a back to top button but to scroll down and up to a certain point on the page! Say for instance you have a long text and

Answer 1

first page 

Basically what you have to do is replace the " #top" with the id of the first section or your page, or it could be the nav... Any id locate in the first part of the page and then try to set some style with css!