Modify the simple example
so that it illuminates not just one pixel, but one pixel after it in the same row. Repeat that
task for the same column. This exercise will show you how to control which pixels are illuminated.
Modify the ping pong sketch so that the ball moves slower/faster.
(Harder). Modify the ping pong sketch so that the rows and columns are interchanged. This will
make it more convenient for players using the handles of the pots.