There are three different types of puzzles possible:
For the first, you eat food while in range of the Sculk Sensor. It will close for you automatically.
For the second, you just step on the marked block. It will also close for you after a bit of time.
For the third, you walk between the walls. It will stay open until you do it again.
Filmed in Java Snapshot 22w13a.
Things may be different in the future.
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#Minecraft #Snapshot #SecretRoom