Minecraft name: Samwej
What do you like the most about redstone?: I love playing around and experimenting with logic.
What’s a thing you have made which demonstrates redstone knowledge?: some 4 bit alu’s
What does the thing do?: it is able to simulate any logic gate and do addition and subtraction
Image(s) and/or video(s) of the device: ORE builder att 2 - Google Slides please read the whole slide it shows my redstone knowlege 
but if you need a pure image of a 4 bit alu i made here is the image https://imgur.com/a/e5xlRNi
What do you plan on making for your build trial?: 4 bit alu(ripple carry)
Do you agree with the rules?: Absolutly