Click the stage to add dots. Click a dot to delete it. Use the slider to change the tempo. Hover over a dot to see its instrument, note and beats. The hue (color) of a dot represents the instrument. The size (and y position) represents the note, and the brightness (and x position) represents the beats the instrument is played for.
The original project is beautiful, but I rearranged the dots to make them easier to manage. I also changed the code a bit so that you can easily add or delete instruments without having to edit the code. Plus I added brightness difference to accentuate the difference in beats (lighter means fewer beats), and a speech bubble displaying info about each dot.
