Here is a cool little hover effect for links that between each link on the page. When you hover over a link it fills with a background colour and when you move to another link the links effect jumps from the existing one to the new one.
If you are having trouble with the pen, try the archived copy on GitHub
Hover Effect Snippet
See the Pen #JavaScript30 Day 22: Follow Along Links by Katherine Kato (@kathykato) on CodePen.0