autostart

function farm()
  turtle.digDown()
  turtle.placeDown()
  turtle.forward()

while true do
  os.sleep(2000)
  for e = 1,3
    for i = 1,8
      farm()
    end
    turtle.digDown()
    turtle.turnRight()
    turtle.placeDown()
    turtle.forward()
    turtle.turnRight()
    for i = 1,8
      farm()
    end
    turtle.digDown()
    turtle.placeDown()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
  end
  farm()
  turtle.digDown()
  turtle.placeDown()
  turtle.turnLeft()
  for i = 1,8
    turtle.forward()
  end
  turtle.turnLeft()
  for i = 1,8
    turtle.forward()
  end
  turtle.turnLeft()
  turtle.turnLeft()
end