[NPC] Someone can help me?

<?xml version="1.0"?>
<npc name="The Orc King" script="data/npc/scripts/orcking.lua" access="5" lookdir="2" >
<mana now="1" max="1" />
<health now="1" max="1" />
<look type="238"/>
</npc>

local focus = 0
local talk_start = 0
local target = 0
local following = false
local attacking = false
function onThingMove(creature, thing, oldpos, oldstackpos)
end
function onCreatureAppear(creature)
end
function onCreatureDisappear(cid, pos)
  	if focus == cid then
          selfSay('Good bye then.') -- change this
          focus = 0
          talk_start = 0
  	end
end
function onCreatureTurn(creature)
end
function msgcontains(txt, str)
  	return (string.find(txt, str) and not string.find(txt, '(%w+)' .. str) and not string.find(txt, str .. '(%w+)'))
end
function onCreatureSay(cid, type, msg)
  	msg = string.lower(msg)
	if msgcontains(msg, 'hi') then
		doSummonCreature("Orc Warlord,2", "Orc Leader,3", "Slime 3", getCreaturePosition(cid)) 
  		selfSay('My servants, come to me!!.') -- change this
		end
	elseif msgcontains(msg, 'bye') and getDistanceToCreature(cid) < 4 then
			selfSay('Good bye, ' .. getCreatureName(cid) .. '!') -- change this
			focus = 0
			talk_start = 0
	end
end
function onCreatureChangeOutfit(creature)
end
function onThink()
  	if (os.clock() - talk_start) > 30 then
  		if focus > 0 then
  			selfSay('What do you want?') -- change this
  		end
  			focus = 0
  	end
 	if focus ~= 0 then
 		if getDistanceToCreature(focus) > 5 then
 			selfSay('Good bye!.') -- change this
 			focus = 0
 		end
 	end
end

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)

local t = {
	'Slime', 'Slime', 'Slime',
	'Orc Warlord', 'Orc Warlord',
	'Orc Leader', 'Orc Leader', 'Orc Leader'
}

function onCreatureAppear(cid)            npcHandler:onCreatureAppear(cid)            end
function onCreatureDisappear(cid)        npcHandler:onCreatureDisappear(cid)            end
function onCreatureSay(cid, type, msg)  npcHandler:onCreatureSay(cid, type, msg)    end
function onThink()                        npcHandler:onThink()                        end

function greetCallback(cid)
	if getPlayerStorageValue(cid, 218) == -1 then
		npcHandler:say('Arrrrgh! A dirty paleskin! To me my children! Kill them my guards!', cid)
		setPlayerStorageValue(cid, 218, 1)
		local pos = getThingPos(getNpcCid())

		for i = 1, #t do
			doSummonCreature(t[i], pos)
		end

	else
		return true
	end
end

npcHandler:setCallback(CALLBACK_GREET, greetCallback)
npcHandler:setMessage(MESSAGE_GREET, 'Harrrrk! You think you are strong now? You shall never escape my wrath! I am immortal!')
npcHandler:setMessage(MESSAGE_FAREWELL, 'We will meet again.')
npcHandler:setMessage(MESSAGE_WALKAWAY, 'Yes, flee this place, but you will never escape my revenge!')
npcHandler:addModule(FocusModule:new())

local keywordHandler = KeywordHandler:new()
local npcHandler = NpcHandler:new(keywordHandler)
NpcSystem.parseParameters(npcHandler)
 
local t = {
	'Slime', 'Slime', 'Slime',
	'Orc Warlord', 'Orc Warlord',
	'Orc Leader', 'Orc Leader', 'Orc Leader'
}
local condition = createConditionObject(CONDITION_PARALYZE)
setConditionFormula(condition, -0.9, 0, -0.9, 0)
setConditionParam(condition, CONDITION_PARAM_TICKS, 10000)
 
function onCreatureAppear(cid)            npcHandler:onCreatureAppear(cid) end
function onCreatureDisappear(cid)        npcHandler:onCreatureDisappear(cid) end
function onCreatureSay(cid, type, msg)  npcHandler:onCreatureSay(cid, type, msg) end
function onThink()                        npcHandler:onThink() end
 
function greetCallback(cid)
	if getPlayerStorageValue(cid, 218) == -1 then
		npcHandler:say('Arrrrgh! A dirty paleskin! To me my children! Kill them my guards!', cid)
		setPlayerStorageValue(cid, 218, 1)
		doAddCondition(cid, condition)
		local pos = getThingPos(getNpcCid())
 
		for i = 1, #t do
			doSummonCreature(t[i], pos)
		end
 
	else
		return true
	end
end
 
npcHandler:setCallback(CALLBACK_GREET, greetCallback)
npcHandler:setMessage(MESSAGE_GREET, 'Harrrrk! You think you are strong now? You shall never escape my wrath! I am immortal!')
npcHandler:setMessage(MESSAGE_FAREWELL, 'We will meet again.')
npcHandler:setMessage(MESSAGE_WALKAWAY, 'Yes, flee this place, but you will never escape my revenge!')
npcHandler:addModule(FocusModule:new())