Self-repairing tunnel

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Complexity: simple
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Self-repairing tunnel

A tunnel that repairs itself.

The tunnel is self-regenerating, as cleanstone generators constantly produce stone that is pushed into the tunnel shape by pistons.

Instructions:

I think that's pretty self-explanatory.
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6 COMMENTS

  1. 1.since einfsch stones are produced and pushed by piston in tunnel form! What is there not to understand?
    2.the length results by itself, because pistons can push only a certain number of stones.

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