prova

function inventory()			-- [1] = oggetto da smistare [14] = coal [15] = bone meal [16] = sapling
  local id = nil
  turtle.turnRight()
  turtle.select(1)

  while ((print(turtle.suck(1)) == "true") do

    turtle.suck(64)
    id = turtle.getItemDetail(1)

    if (id.name == "minecraft:coal") then
      turtle.transferTo(14, turtle.getItemSpace(14))
      turtle.dropUp(64)
    elseif (id.name == "minecraft:dye") then
      turtle.transferTo(15, turtle.getItemSpace(15))
      turtle.dropUp(64)
    elseif (id.name == "minecraft:sapling") then
      turtle.transferTo(16, turtle.getItemSpace(16))
      turtle.dropUp(64)
    end

  end

  turtle.turnLeft()
end

--__________________________

function lumberjack()
  turtle.select(1)
  while(turtle.detect()) do
    turtle.dig()

    if (turtle.detectUp()) then
      turtle.digUp()
    end

    turtle.up()
  end

  while not (turtle.detectDown()) do
    turtle.down()
  end

end

--__________________________

function refuel()
  if(turtle.getFuelLevel < 20)
    turtle.select(14)
    turtle.refuel(5)
  end
end

--__________________________

inventory()

while not (turtle.getItemCount(16) == 0) do
  if not (success) then
    turtle.select(16)
    turtle.place()
    turtle.select(15)
    while not (turtle.inspect().name == "minecraft:log") do
      turtle.place()
    end
  end

  refuel()
  lumberjack()
end