Press the button, and the notes will play and vividly change colour before flashing back to their gray state. Extract from Ode to Joy by Beethoven. The last note plays twice.
Mostly by me, with a suggestion by @kingspass Update information below: v1: Original. v2: Removed the colour stuck bug and added more notes. v3: Added a dynamic to the last note. v4: Made the notes play when clicked. Suggestion by @kingspass
