How do I achive this effect?

Hi. I’m new at Webflow and I’m trying to learn in order to build my portfolio. I’ve stumbled across a very interesting effect, and I’m wondering how to make it. Here is the link:

It’s this effect on the main page, where the links change colors and corresponding background images. They change on mouse hover and by themselves. Any tips on how to make something like this?

Nelson from Pixel Geek did a life video about this yesterday. The video is about nested symbols but contains also an example of what you (change background on hover) want to do.
Maybe it’s not online yet, but will in the coming hours.

Thank you. I’m gonna watch the video. It’s already on.