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Win a free journey on the STA Railways network

CoffeeAndChill
CoffeeAndChill Lord, Arbiter, Engineer
  1. Read this: https://gaming.stackexchange.com/questions/274911/how-do-i-delay-a-command
  2. Adapt it to detect when a minecart passes over a specific kind of block
  3. Make minecarts stop for X seconds when they pass over the specific kind of block (Redstone ore?) — constantly teleport the minecart to its current coordinates??
  4. Stop teleporting the minecart to itself, and it should continue

Can you crack it?