ender-lily farm

-- ender lily farm using TE autonomous activators, rednet cabling, vacuum hoppers, and itemducts
local side = "bottom"  --side the monitor is on
local tcolor = colors.white --text color
local bgcolor = colors.red  -- background color
local m =peripheral.wrap(side) -- wraps the peripheral for use
local heading = "Time Remaining" --header text

m.clear() -- clears the monitor
m.setCursorPos(1,1) --sets the cursor to the top left
m.setTextScale(1) --sets the text scale on the monitor
m.setTextColor(tcolor) -- sets text color
m.setBackgroundColor(bgcolor) --sets background color

function center(text) --pretty self explanatory here.
  x,y = m.getSize()
  x1,y1 = m.getCursorPos()
  m.setCursorPos((math.floor(x/2) - (math.floor(#text/2))), y1)
  m.write(text)
end

local function cycle()
  rs.setBundledOutput("back", colors.white) --redstone on
    sleep(1)
  rs.setBundledOutput("back", 0) --redstone off
end


function time() --the countdown timer

  local su = fs.open("time", "r") -- opens the backup file in read only
  local i = tonumber(su.readAll()) -- reads the time remaining

    repeat
      m.setCursorPos(1,3)
      center(heading) --centers the heading
      m.setCursorPos(1,5)
      i=i-1
      center(tostring(i)) --centers the count down timer
      sleep(1)
      su.close() -- closes the read only file

       local f=fs.open("time", "w") -- opens the backup file in writable mode
         f.write(tonumber(i)) -- updates the file
         f.close() -- closes and saves the updates to the file
   until i<1 --ending condition for the repeat loop

  m.clear() --clears the monitor
  center("Harvesting and Planting") --display output when the timer finishes
  cycle() -- fires the redstone pulse
  m.clear() --clears the monitor again when done

  local Res = fs.open("time", "w") --opens the backup in writable mode again
  Res.write(tonumber(8500)) --resets the time for ~1 minecraft week
  Res.close() --saves the update and closes the file

end

while true do
--center(textutils.formatTime(os.time(), false)) displays the current minecraft time @start. won't update yet.
local h = fs.open("time", fs.exists("time") and "a" or "w") --checks if the file exits
local defTime = "8500" --rough time in a minecraft week in seconds
  if not h then
  print("File not found. Creating new file.")
  h.write(tonumber(defTime)) --creates the file with you starting run time
  h.close()
  else
  print("Reading file...")
  local r=fs.open("time", "r")
  local res=r.readAll()
  sleep(1)
  time()
  print("Resetting")
  sleep(1)
  end
end