EDIT: I remade this and updated the world download. If you want to see the new version, here are the new screenshots.
After watching Mumbo Jumbo's lamp display video I was inspired to make my own version. This design is horizontally tile-able, except for the clearing function, so if you wanted to expand it you would have to adjust that a bit.
P.S. If you use the clear function and some of the pixels don't work that means the powder block somehow broke and you can fix it by following the broken pixel in a line back and replacing it.
Very nice. Great job!
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Thanks! After posted this I saw the one semletiFR tweeted at Mumbo and my competitiveness drove me to make a new 12x12 display. The new one is slower but is actually smaller than this one.
Here's what it looks like if you're interested.
Holy crap! It looks so compact! Great work!!