You can build your project by forking this CodePen pen. Or you can use this CDN link to run the tests in any environment you like: https://cdn.freecodecamp.org/testable-projects-fcc/v1/bundle.js
Can I do it in codepen? I mean should I paste ` in my html section before the end of body tag in codepen?
And can you please elaborate what does it mean by “forking this code pen”?
yes paste it in codepen in the html section before the </body>
forking is another option. Then you copy the example tribute page pen made by freecodecamp. After that you can edit it. but I would recommend to paste the script in your own codepen.