Mission 221
Ring Portal: Build a Giant Gate to Another World
Badge: Portal Keeper
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Build a triple-ring portal (radius 5, 10, 15) and find its secret number.
Legends say three glowing rings on one centre open a gate. Build them perfectly round… if blocks allow it.
- New skill Plotting circles with coordinates
- Level 3 · Dream City
- Difficulty Beginner
- Mode Creative
- Time 30–45 min
- Ages 13+
What you’ll build
Use a coordinate hack to plot a quarter circle, mirror it into a full ring, then add two bigger rings on the same centre to form a glowing portal gate. Count each ring's blocks, hunt for the circle's secret number, and decide where your portal really leads.
Finish line: Your triple-ring portal glows on one centre, and you've tested every ring against 3.14 × diameter.
Bonus challenge: Count the straight and diagonal steps in one ring. Add straight + 1.41 × diagonal. Does the secret number get closer to 3.14?
You’ll need
- Blocks in 3 colours
- Light blocks
- A calculator
You choose
- My portal's name
- Where it leads (sky realm, ocean world, the Void…)
- My bet for the radius 10 ring: ___ blocks
Stuck?
- Ring has flat spots? Once z drops below x, swap them. The second half of each quarter mirrors the first.
- Getting about 2.8 instead of 3.14? That's expected: diagonal steps are longer than they look.
- Building it upright? Use x and y instead of x and z, counted from a marked centre block.
For grown-ups
Get this mission
This mission is in Mission Pack 22. 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.