Wizards of Lua

The Art of Spell Crafting

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Random Walking Grass

With a spell it’s really easy to visualize a 2-dimensional random walk.

Here is a photo of the remains left by a random walking grass block.

Just paste the following source code into a command block.

/lua grass=Blocks.get("grass");
dir={"north","south","east","west"};
for i=1,200 do
  spell:move(dir[math.random(#dir)]);
  while spell.block.material.solid do
    spell:move("up");
  end;
  spell:move("up");
  while spell.block.material.solid==false do
    spell:move("down");
  end;
  spell:move("up");
  spell:execute("particle largesmoke ~ ~ ~ 0.3 0.3 0.3 0 4");
  sleep(2);
  spell.block=grass;
end;

Since we are in a 3-dimensional world we have to make sure that the new block is always placed on the topmost place. That’s why we have those two while-loops in the middle of the spell. On the bottom you can see the usage of the Spell’s very powerful execute function that can execute any Minecraft command. Here we use it to create some fancy particle effects.

Now attach a button to the command block and press it.