Reviewing past projects on codepen

Once I’ve submitted my codepen in the Responsive Web Design projects and recieved the big green tick allowing me to continue to the next project, how can I go back and see that codepen at a later date?

The obvious answer is to create a codepen account and save that to the pens/projects right?

But what if I don’t have an don’t intend to create an account?

really having an account (they’re free) is a good idea. you can use that to store projects for your portfolio.