Coding is fun. To get a taste of it, just click the play button in the frame below to hear the music. Type in different digits or notes within the flashing rectangles. Click the stop button and the play button in the upper-right corner of the frame to hear the results.

For instance, when you’re ready to experiment, replace “sd:2” in line number 8 with “sd:4”. Then, click the Stop button and then the Play button again.

If anything breaks, just reload this page.