Create a new page and name it after your project.
In the Scratch website, save your project, then click "Share."
Now click "See Project Page." Copy the link at the lower right of your project page. It looks like this:
Back on your website's new page, under "Insert," click "Embed" <>. You are embedding "by URL."
Now paste the link you just copied from your project page on Scratch.
Type the word "embed" at the end of the link. Now it looks like this:
https://scratch.mit.edu/projects/279170485/embed
Click "Insert."
Now that you've embedded the project, and added instructions in a text box, it's time to publish!