apothecary

local drop = turtle.drop

--local signal = true
local function toggle(onOff)
--  signal = not signal
  rs.setOutput("bottom",onOff)
end

local function searchSeed()
  local item = nil
  for i=1,16 do
    item = turtle.getItemDetail(i)
    if item and item.name == "minecraft:wheat_seeds" then return true end
    if not item then return false end
  end
  return false
end

local function checkNWait()
  while not searchSeed() do
    local event = os.pullEvent("turtle_inventory")
  end
  return searchSeed()
end

local function dropIngredients()
  local i = 1
  local done = false
  local item = nil
  while i < 17 and turtle.getItemCount(i) > 0 and not done do
    turtle.select(i)
    item = turtle.getItemDetail(i)
    if item and item.name == "minecraft:wheat_seeds" then done = true end
    turtle.drop(1)
    i = i + 1
  end
end

toggle(true)
while true do
  print("Insert seeds as _last_ ingredient")
  checkNWait()
  dropIngredients()
  sleep(0.5)
  toggle(false)
  sleep(5)
  toggle(true)
end