Using one command block, I effectively added a parachute into bedrock and found an excuse to make the longest command I've ever made. : r/MinecraftCommands
Learn To Code: Scripting Minecraft Command Blocks - 1 License
Only One Command Mining Machine [1.9] ~ thvardhan - Commands, Command Blocks and Functions - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum
Amazon.com: Ultimate Guide to Mastering Command Blocks!: Minecraft Keys to Unlocking Secret Commands eBook : Triumph Books: Kindle Store
My Favorite Command Block Commands : 6 Steps - Instructables