TurtleRefuel

function refuelWithLava()
  for slot = 1, 16 do
    turtle.select(slot)
    local item = turtle.getItemDetail()

    if item and item.name == "minecraft:lava_bucket" then
      if turtle.refuel() then
        print("Refueled with a lava bucket.")
      else
        print("Error: Could not refuel with a lava bucket.")
      end
    end
  end
end

refuelWithLava()
turtle.select(1)