Add button Back to top

Intro

This is a simple way to integrate the button Back-to-top into a jekyll website

First Step

Inspired by this Repo Add button Back to top https://github.com/vfeskov/vanilla-back-to-top

First step. First move

Add to this file _includes\scripts.html

<script src="https://unpkg.com/vanilla-back-to-top@7.2.1/dist/vanilla-back-to-top.min.js"></script>
<script>addBackToTop({
  diameter: 56,
  backgroundColor: 'rgb(255, 82, 82)',
  textColor: '#fff'
})</script>

First step. Second move

How to modify https://github.com/vfeskov/vanilla-back-to-top/blob/v7.2.1/EXAMPLES.md