startup

local cut = 0

while true do

  turtle.suck()

  turtle.turnRight()

  local ok,block = turtle.inspect()

  if ok and block and block.name:match("log") then

    turtle.select(2)

    turtle.dig()

    turtle.forward()

    while turtle.detectUp() do

      turtle.digUp()

      if turtle.getFuelLevel()<900 then

        turtle.refuel()

      end

      turtle.up()

    end

    while turtle.down() do

    end

    turtle.back()



    for i = 1, 16 do

      local item = turtle.getItemDetail(i)

      if item and not item.name:match("sapling") then

        turtle.select(i)

        turtle.dropUp()

      end

    end

    --[[turtle.select(1)

    turtle.place()]]

    if cut == 0 then

      cut = 180

    end

  elseif not ok then

    turtle.select(1)

    local item = turtle.getItemDetail()

    if item and item.name:match("sapling") then

      turtle.place()

    else

      for i = 1, 16 do

        turtle.select(i)

        local item = turtle.getItemDetail()

        if item and item.name:match("sapling") then

          turtle.transferTo(1)

          turtle.select(1)

          turtle.place()

          break

        end

      end

    end

  end

  if cut > 0 and turtle.getItemCount(1) < 32 then

    cut = cut-1

    if cut == 0 then

      turtle.down()

      turtle.suckDown()

      turtle.up()

    end

    if cut%20==0 then

      print(cut)

    end

  end

--[[  if turtle.getFuelLevel() < 1000 then

    turtle.select(2)

    turtle.suckUp()

    turtle.select(1)

    turtle.dropUp()

    turtle.craft()

    for i = 1, 16 do

      turtle.select(i)

      turtle.refuel()

    end

    turtle.select(1)

    turtle.suckUp()

  end ]]

end