Click the central star to start the drone, then improvise some music by clicking on the other stars.
Thanks to wohar01 for the original project Star Music remix. Thanks to bluemaster58 for the original project Star Music. My changes include editing for a circular layout, switching the coding from sound effect blocks to music blocks to give more precise control of the sounds, using the notes of the C pentatonic scale, and adding a central star/sun that, when clicked, plays a long, low drone.