EXTEND: Now try out your program and customize it! Be sure to meet the following requirements:

1. Change the number in your .set_gravity() command!
2. Add another star named star9.
3. Use star_size and star_color inside your new star's arguments!
4. Run your program. Then, click Submit to turn in your work and continue.

To navigate the page using the TAB key, first press ESC to exit the code editor.