Changes

* Try changing the value of the <code>timer</code> variable. As the comment in the program says, <code>// The higher the number, the slower the timing.</code>. Conversely, the smaller the value the faster the timing. At what value of <code>timer</code> do the lights appear to stay on continuously? ____.

* Remember my multiplexed display example in class, I was technically turning each column on one-at-a-time, but past a point it looked as if the whole smiley-face image was on non-stop. This has to do with the idea of [http://en.wikipedia.org/wiki/Persistence_of_vision persistence of vision]. At what value for <code>timer</code> does it appear that all LEDs are on continually ____.

* Examples of displays utilizing POV:

** http://www.ladyada.net/make/minipov3/index.html