corn

function pickRow()
  local steps = 0
  turtle.up()
  while (turtle.forward()) do
    turtle.turnLeft()
    if (turtle.detect()) then
      turtle.dig()
      turtle.forward()
      turtle.digDown()
      turtle.suckDown()
      turtle.select(1)
      turtle.placeDown()
      turtle.forward()
      turtle.suckDown()
      turtle.back()
      turtle.back()
      turtle.suckDown()
    end
    turtle.turnRight()
  end

  while (steps > 0) do
    if (turtle.back()) then
      steps = steps - 1
    end
  end
  turtle.down()
end


while (true) do
  pickRow()
  sleep(120)
end