You’ve completed the Intro to Web Design tutorial so there’s not much point in my going over stuff we’ve already encountered. Therefore I have provided a starting template that you can download and work from:
The template simply has a starting HTML, CSS and JS file. The CSS and JS file are both empty apart from a comment and the HTML file just has the head set up correctly.
If any of the downloaded files are confusing then before we move on I suggest going back over the Intro to Web Design tutorial!