A couple years ago, I remember watching countless Youtube videos of people building redstone computers, and I would think to myself how are people building computers in redstone while I can't even understand how to use comparators. Years later, I still have no idea what comparators do, but that hasn't stopped me from finally putting together my own redstone computer after a couple weeks of grinding! It's super slow and has no real-world use, but this has been a lil childhood dream of mine and I'm pretty happy with how it turned out. It's fully functional, and able to calculate 5 numbers of the Fibonacci sequence in only 10 minutes!...
It's very much built à la Minecraft 2012-2014, exclusively using redstone, torches and repeaters, and colored wool for aesthetics.