Xxnoob_playz1xX's second build thing

Minecraft name:
What do you like the most about redstone?:
you can build computers that do ANYTHING
What’s a thing you have made which demonstrates redstone knowledge?:
a alu/ adder and subtractor
What does the thing do?:
adds and subtracts using logic gates
Image(s) and/or video(s) of the device:

What do you plan on making for your build trial?:
a 4 bit alu because its more simple than this 16 bit
Do you agree with the rules?: why not? yes.

why did you ban mee i said im sorry wow