digger

function step()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.digDown()
  turtle.turnLeft()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.digDown()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.forward()
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  turtle.digDown()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnRight()
end


function nextSel(Ind)
  local stop = 0
  while turtle.getItemCount(Ind) == 0 and stop == 0 do
    Ind = Ind + 1
    if Ind > 16 then
      Ind = 1
      stop = 1
    end
  end
  turtle.select(Ind)
end


local N = (...)

for i = 1, N do
  step()
  if i % 5 == 0 then
    print("Percorsi " .. i .. " Blocchi.")
  end
  if i % 20 == 0 then
    nextSel(1)
    turtle.placeDown()
  end
end

for i = 1, N do
  turtle.back()
end