pacman problem

[Nosaa]

i want know how this script work what is dif ?? if dif == 2 then prize = 10 end what dif mean?? and what action for area ground and what action for teleport please if u know help me

Code:

-- Pacman script: Controller [TGY] 
pressedTiles = {}
gameStarted = false
dif = 1

local function pacmanCounter(text, start, col, dif)
	if start then 
		gameStarted = true
		doCreateMonster("Pacman Ghost", {x = 270, y = 2019, z = 9})
		if dif > 1 then
			doCreateMonster("Pacman Ghost", {x = 280, y = 2019, z = 9}) 
		end
		if dif > 2 then
			doCreateMonster("Pacman Ghost", {x = 275, y = 2019, z = 9}) 
		end
	end
	doSendAnimatedText({x = 275, y = 2024, z = 9}, text, col)
end

function onStepIn(cid, item, position, lastPosition, fromPosition, toPosition, actor)
	if false == isPlayer(cid) then
		return
	end
	
	if item.actionid == 5301 and item.itemid == 426 then
		-- HANDLE TILE
		if not gameStarted then
			--doPlayerPopupFYI(cid, "x")
			doTeleportThing(cid, fromPosition, true)
			return true
		end
		doTransformItem(item.uid, 425)
		table.insert(pressedTiles, position)
		local cnt = #pressedTiles
		doSendAnimatedText(position, (cnt).."/84", TEXTCOLOR_GREEN)
		if cnt > 83 then
			doTeleportThing(cid, {x = 271, y = 2016, z = 8}, true)
			doSendAnimatedText(position, ":D", TEXTCOLOR_GREEN)
			local prize = 5
			if dif == 2 then prize = 10 end
			if dif == 3 then prize = 20 end
			doPlayerSendTextMessage(cid, MESSAGE_STATUS_CONSOLE_ORANGE, "[PACMAN] You won ".. prize .." Game Tokens!")
			doPlayerAddItem(cid,6527,prize)
		end
	elseif item.actionid == 7392 then
		-- HANDLE JOINING PERSON
		local c = isCreatureInArea({x = 270, y = 2019, z = 9},{x = 280, y = 2029, z = 9}) -- Getting crss inside
		for _,v in pairs(c) do
			if isPlayer(v) then
				doTeleportThing(cid, fromPosition, true)
				return true
			end
		end
		-- Nobody is inside, check ticket/pick it - check exhaust first
		--doPlayerPopupFYI(cid, "You must wait " .. (math.floor((getPlayerStorageValue(cid, 7948)-os.time())/60)+1) .. " more minutes till you can play again.")
		if getPlayerStorageValue(cid, 7948) > 0 and (os.time() < getPlayerStorageValue(cid, 7948)) then
			doTeleportThing(cid, fromPosition, true)
			doPlayerPopupFYI(cid, "You must wait " .. (math.floor((getPlayerStorageValue(cid, 7948)-os.time())/60)+1) .. " more minute(s) till you can play again.")
			return true
		end
		if getPlayerItemCount(cid, 6527) < 1 then
			doTeleportThing(cid, fromPosition, true)
			doPlayerPopupFYI(cid, "You need 1 Game Token to play.")
			return true
		end
		doPlayerRemoveItem(cid, 6527, 1)
		setPlayerStorageValue(cid, 7948, os.time() + 900)
		-- Set difficulity variabele
		dif = 1
		if item.uid == 7396 then
			dif = 2
		elseif item.uid == 7397 then
			dif = 3
		end
		-- Clean the area and reset the tiles now
		for _,v in pairs(c) do
			doRemoveCreature(v)
		end
		for _,v in pairs(pressedTiles) do
			doItemSetAttribute(doCreateItem(426, v),"aid", 5301)
		end
		pressedTiles = {}
		gameStarted = false
		doTeleportThing(cid, {x = 275, y = 2024, z = 9}, true)
		pacmanCounter("3", false, TEXTCOLOR_RED, dif)
		addEvent(pacmanCounter,1000,"2", false, TEXTCOLOR_ORANGE, dif)
		addEvent(pacmanCounter,2000,"1", false, TEXTCOLOR_YELLOW, dif)
		addEvent(pacmanCounter,3000,"GO!", true, TEXTCOLOR_GREEN, dif)
	end


	return true
end[CODE]