The program starts by setting the display to and then to clear the screen. Lines 20 through 27, and the associated subroutines at line 100 and 200, are the color selection code Wozniak demonstrated for Jobs. Line 30 sets up the text window with and then uses a series of and statements to draw the playfield and the score display in the text window. The entire main loop runs from line 40 through 90 with associated subroutines. Another large amount of code near the end of the program is concerned with printing the final score. Other notes of interest include the (not-equal) comparisons on line 20, the production of a high-pitch sound using a string of s on line 65 compared to a lower-pitched tone using a loop on line 70, and the mix of graphics and text on a single display.