Final answer:
CodePen is an interactive website where different coding 'pens', or snippets, are displayed. It's used largely as an open-source learning environment for HTML, CSS, and JavaScript languages. Users can create their own pens, fork existing ones, and showcase their coding skills.
Step-by-step explanation:
The interactive website which displays the code for different 'Pens' is called CodePen. CodePen is an online community for testing and showcasing user-created HTML, CSS, and JavaScript code snippets. It functions as an open-source learning environment, where developers can create code snippets, known as 'pens', and test them. Developers can explore other pens, fork them to create their own versions, and display their own coding expertise.
Learn more about CodePen