[TIME SAVER UPDATE]: The Redstone on this mechanism is slightly outdated. HOWEVER, I have double-checked the design and still functions as intended. I strongly encourage you to refer to the map download to help prevent problems, but viewing my YouTube video will also help you. In a way, Redstone is its own type of math - if there's an error early on in the process, the result will be incorrect. Hope all goes well :) Best wishes - Cubey

This Minecraft Redstone (voice commentated) tutorial is designed to be fast, quick, and easy for everyone to follow (ESPECIALLY BEGINNERS)! I hope you enjoy the tutorial and learned the basic function of the four-button combination lock system. A lot of work went into this video. If you could just do the small favor of liking this video, it would mean the world, thank you. :)

You could also subscribe to #TeamCubeZone for more amazing Redstone creations, including regular builds, base entrances, secret rooms, and traps to kill unwanted guests! ;)

NOTICE: the Minecraft World Save file is a .zip file. The World Save mediafire link is a .rar file. Just so you're aware!

For another way, view my Video's description:
https://youtu.be/T4g247AT93A