CC simple farm

shouldGoLeft = true
loops = 0

print("starting in 10 seconds")
sleep(10)

function turnLeft()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
end

function turnRight()
  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
end

function isGrown(blockInfo)
  return blockInfo.state.age == 3
end

function goHome()
  print("going home")
  turtle.turnLeft()
  i = 0
  while (i < 17) do
    i = i + 1
    turtle.forward()
  end
  turtle.turnLeft()
  print("sleeping...")
  sleep(600)
  print("starting!")
  loops = 0
  shouldGoLeft = true
end

function placeSeeds()
  digged, reason = turtle.digDown()
  if (digged == false) then
    print(reason)
  end

  placed, reason = turtle.placeDown()
  if (placed == false) then
    print(reason)
  end

  while (true) do
    pickedUp, _ = turtle.suckDown()
    if (pickedUp == false) then
      break
    end
  end
end

function farmBlock()
  hasBlock, blockInfo = turtle.inspectDown()
  if hasBlock then
    if isGrown(blockInfo) then
      placeSeeds()
    end
  else
    placeSeeds()
  end
end

while (true) do
  i = 0
  while (i < 9) do
    turtle.forward()
    farmBlock()

    i = i+1
  end

  loops = loops + 1

  if (loops == 18) then
    goHome()
  elseif (shouldGoLeft) then
    shouldGoLeft = false
    turnLeft()
  else
    shouldGoLeft = true
    turnRight()
  end
end