When this is done as part of the actual class, there will be 32 notes to enter (not just 8 as in this demo). There are instructions to follow to choose the notes based on what has been learned in the lessons.
In this demonstration, it will return a MIDI file with the notes you selected as soon as you send it! In the course, it won't return a MIDI file right away. Instead, it will be added to any other music compositions which have been done during the same week by other students taking the class, and harmony added to it, and then it will be added to the Music Compositions web page.
When you're finished, click the "Send the Song" button!