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Build a 3-button sequence lock, with decoy buttons that reset everything.
Right buttons, wrong order? The vault stays shut. Press a decoy? Total reset. Build a lock only you can open.
- New skill Building a sequence lock
- Level 6 · Inventor's Lab
- Difficulty Intermediate
- Mode Creative
- Time 60–90 min
- Ages 13+
What you’ll build
Take on the pack's biggest build: a vault that opens only when the right buttons are pressed in the right order. Memory latches and AND gates remember each step, while decoy buttons reset everything. Then dare a tester to crack it.
Finish line: Your vault opens only to the right button order, and any decoy press resets it.
Bonus challenge: Add a fourth stage. How many orders does a 4-button code have? Then add an alarm: a decoy press also rings note blocks!
You’ll need
- Buttons
- Redstone torches
- Repeaters
- Redstone dust
- An iron door
- A tester
You choose
- My vault's name
- My secret order
- Where I hide the decoys
Stuck?
- Build and test one stage at a time before adding the next.
- Signals leaking between lines? Repeaters act as one-way valves where wires meet.
- Decoy not resetting? It must feed the Reset side of all three latches.
For grown-ups
Get this mission
This mission is in Mission Pack 56. Each printable has the full steps, a Plan & Log page and a parent page.
Print one mission at a time. You never need to print everything.
Played on Minecraft Bedrock on iPad. Buttons can differ on other devices and versions.