GitHub - dcgruenig/Minecraft-Vanilla-Sign-Shop-Generator: Generate buy and sell signs in vanilla Minecraft to create a sign shop that doesn't need any command blocks to maintain. This will allow you to keep the speed
Villager Trade Generator (Java Edition 1.12)
I present to you the 4 cobblestone generator with only 1 bucket of lava and 1 bucket of watter : r/Minecraft