Portal 2

Portal 2

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CRC-4? (easy)
   
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CRC-4? (easy)

Description
I tried to make a CRC-4 shift register. I haven't tested if it works correctly, but the test chamber is completable.

(okay, to be completely honest, this is mostly me trying to figure out how to use the built-in editor. it's definitely easier than using the authoring tools, especially on linux.)