STEP 1: We'll start with a list of image labels for the background.

• Click LOGIC, go to and drag List of Strings into the top section of your program.
• Name the list stage_list by changing the variable name from my_list to stage_list.
• Change the three values in the list to "moon", "mars", and "jupiter". Don't delete the commas!
• Click Submit and Next to move on.

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