stone_block_crafter

-- turtle.craft(number quantity ( if not supplied will craft as many as possible ))
-- turtle.select(number slotNumber (1-16 in ComputerCraft 1.4+, otherwise 1-9))
-- turtle.getItemCount(slot)
-- turtle.suckDown([number amount])
  -- boolean true if at least one item was moved into the turtle's inventory; false otherwise.

function craft_and_drop()
  turtle.select(16)
  turtle.craft()
  turtle.turnRight()
  turtle.turnRight()
  turtle.drop()
  turtle.turnRight()
  turtle.turnRight()
end

function dump(start_point,end_point)
  for i=start_point,end_point,1 do
    turtle.select(i)
    turtle.dropDown()
  end
end

while true do
  dump(1,16)
  turtle.select(1)
  turtle.suckDown(64)
  local blockcount = turtle.getItemCount(1)
  if blockcount > 3 then
    -- spread blocks out evenly
    local each_slot_count = math.floor(blockcount / 4)
    turtle.dropDown()
    turtle.suckDown(each_slot_count)
    turtle.select(2)
    turtle.suckDown(each_slot_count)
    turtle.select(5)
    turtle.suckDown(each_slot_count)
    turtle.select(6)
    turtle.suckDown(each_slot_count)
    craft_and_drop()
  else
    print('Waiting 5 min')
    os.sleep(300) -- 5 min
  end
end