Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can only control 1 "The World Legacy". Each time a face-up Level 5 or higher monster(s) is sent from the field to the GY, place 1 counter on this card for each sent card (max. 7). You can send this card with 7 counters to the GY; Special Summon 1 Cyberse Link Monster from your Extra Deck.
--星遺物の導く先
--The World Legacy
--Scripted by Eerie Code
local s,id=GetID()
local COUNTER_WL =0x14f
function s.initial_effect(c)
	c:SetUniqueOnField(1,0,id)
	c:EnableCounterPermit(COUNTER_WL)
	c:SetCounterLimit(COUNTER_WL,7)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--add counter
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_FIELD)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetRange(LOCATION_SZONE)
	e2:SetOperation(s.acop)
	c:RegisterEffect(e2)
	--spsummon
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCondition(s.spcon)
	e3:SetCost(Cost.SelfToGrave)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
function s.cfilter(c)
	return c:IsPreviousLocation(LOCATION_MZONE) and c:IsPreviousPosition(POS_FACEUP)
		and c:GetPreviousLevelOnField()>=5
end
function s.acop(e,tp,eg,ep,ev,re,r,rp)
	local ct=eg:FilterCount(s.cfilter,nil)
	if ct>0 then
		e:GetHandler():AddCounter(COUNTER_WL,ct,true)
	end
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetCounter(COUNTER_WL)==7
end
function s.spfilter(c,e,tp)
	return c:IsRace(RACE_CYBERSE) and c:IsLinkMonster() and Duel.GetLocationCountFromEx(tp,tp,nil,c)>0 and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_EXTRA,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_EXTRA,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end