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.
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EDIT: I remade this and updated the world download. If you want to see the new version, here are the new screenshots.
https://imgur.com/a/hEco0
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.
Screenshots:
https://imgur.com/a/4h4WN
World Download:
http://www.mediafire.com/file/575zvhkqmb299na/PixelDisplay.zip
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.