isFluix = false
isCertus = false
isQuartz = false
isPureFluix = false
i = 1
workToDo = 0

function CheckForWork()
-- If anything in slot 1-13 we have work to do

    for i=1,13 do
        local ItemFound = turtle.getItemCount(i)
		if (ItemFound ~= 0)
		then
			workToDo = 1
		end
    end
end

function CheckWorkStatus()
-- Check the status of the work in progress
-- Anything unfinished will be found by the
-- next CheckForWork cycle

	turtle.suckDown()
	for i=1,13 do

		turtle.select(i)

		isFluix = turtle.compareTo(13)
		isCertus = turtle.compareTo(14)
		isQuartz = turtle.compareTo(15)
		isPureFluix = turtle.compareTo(16)

		if isFluix == true then
		  turtle.dropUp()
		elseif isCertus == true then
		  turtle.dropUp()
		elseif isQuartz == true then
		  turtle.dropUp()
		elseif isPureFluix == true then
		  turtle.dropUp()
		end
    end
  end

 --Main
 while true do
	-- Start off with the toggle bus off
	-- only turn on when there's work to do

	redstone.setOutput("back", false)
	CheckForWork()
	if workToDo == 1 then
		-- Now we can turn on the accelerators
		-- and run a cycle
		redstone.setOutput("back", true)

		for i=1,13 do
		-- Since we have work, drop the items
			turtle.select(i)
			turtle.dropDown()
		end
		-- now wait a bit for it to process
		os.sleep (60)
	end
	CheckWorkStatus()
 end