View difference between Paste ID: zPSsCTtv and fj1dMFBg

 --Wrap the Blood Altar
 a=peripheral.wrap("left")
 
 -- Update this depending on what direction you have a chest(s) against your altar, valid directions are "north", "south", "east", "west"
 -- This is the direction of the 'pull' chest where the stone is supplied
 pullDir = "east"
 -- This is the direction of the 'push' chest, where the created slates will be stored.
 pushDir = "south"
 
 -- Declare id numbers for the different slates for the computer to compare to.
 ids = {...}
 ids["Basic"] = 4945
 ids["Reinforced"] = 4946
 ids["Imbued"] = 4997
 ids["Demonic"] = 4998
 ids["Stone"] = 1
 
 -- This function handles creating the slates once things are verified
 local function slate(dest,amt)
 	for i=1,amt do
 		count = amt + 1 - i
 		term.clear()
   		term.setCursorPos(1,1)
 		print("Number of ", dest," Slates left to make: ",count)
 		pullIt(pullDir)
 		item = a.getStackInSlot(1)
-		while item == nil do
+		while item["id"] == nil do
 			pullIt(pullDir)
 			item = a.getStackInSlot(1)
 		end
 		id=item["id"]
 		while id ~= ids[dest] do
 			os.sleep(1)
 			item = a.getStackInSlot(1)
 			while item == nil do
 				pullIt(pullDir)
 				item = a.getStackInSlot(1)
 			end
 			id = item["id"]
   		end
 		pushIt(pushDir)
 	end
 end
 
 -- The function that will pull items from the certain chest, allows for a chest size of up to 108 slots.  Will cycle through the slots till it finds an item to pull into the altar.
 function pullIt(pullDir)
 	item = a.getStackInSlot(1)
 	p = 1
-	while item == nil do
+	while item["id"] == nil do
 		a.pullItem(pullDir,p,1)
 		p = p + 1
 		if p > 108 then
 			p = 1
 		end
 		item = a.getStackInSlot(1)
 	end
 end
 
 -- The function that will push items into a certain chest, allows for a chest size of up to 108 slots.  Will cycle through the slots till it finds a slot to push into the chest.
 function pushIt(pushDir)
 	c = 1
 	while not a.pushItem(pushDir,c) do
 		c = c + 1
 		if c > 108 then
 			c = 1
 		end
 	end
 end
 
 -- Function that will request the number of items to make then pass through to create the slates once a valid number has been entered.
 local function amount(dest)
 	rNum = "a"
 	while rNum ~= tonumber(rNum) do
 		term.clear()
 		term.setCursorPos(1,1)
 		print("Please enter the amount of ",dest," Slates to make")
 		print("Enter 'exit' to return")
 		print("-----------------------------------------")
 		rNum = read()
 		if rNum == "exit" then
 			return
 		end
 
 		if tonumber(rNum) == nil then
 			print("Invalid Entry")
 			sleep(1)
 		elseif tonumber(rNum) > 0 then
 			slate(dest,rNum)
 			return
 		else
 			print("Invalid Number")
 			sleep(1)
 		end
 	end
 end
 
 -- Main function that will run until q is pressed, certain key presses will go for different slates.
 while true do
 	term.clear()
   	term.setCursorPos(1,1)
   	print("Welcome to the Advanced Blood Altar Slate Maker")
   	print("-----------------------------------------------")
   	print(" Press Q to quit")
   	print(" Press B to create Basic Slates")
   	print(" Press R to create Reinforced Slates")
   	print(" Press I to create Imbued Slates")
   	print(" Press D to create Demonic Slates")
 
 	local e, p1, x, y = os.pullEvent()
 	-- If we receive a Q key then we quit (like we said we would)
     	if e == "key" then
       		os.pullEvent("char")
       		if p1 == keys.q then return
 
       		elseif p1 == keys.b then
 			dest = "Basic"
 			amount(dest)
 		elseif p1 == keys.r then
 			dest = "Reinforced"
 			amount(dest)
 		elseif p1 == keys.i then
 			dest = "Imbued"
 			amount(dest)
 		elseif p1 == keys.d then
 			dest = "Demonic"
 			amount(dest)
 		else
 			print("Invalid Keypress")
 			sleep(3)
 		end
 	end
 end