Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
While face-up on the field, this card cannot be banished. Each time a Dinosaur-Type monster(s) is sent to your Graveyard, place 2 counters on this card. You can Tribute this card; Special Summon 1 Dinosaur-Type monster from your Deck whose Level is less than or equal to the number of counters that were on this card.
--奇跡のジュラシック・エッグ
--Miracle Jurassic Egg
local s,id=GetID()
function s.initial_effect(c)
	c:EnableCounterPermit(0x14)
	--cannot remove
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetCode(EFFECT_CANNOT_REMOVE)
	e1:SetRange(LOCATION_MZONE)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e2:SetTargetRange(1,1)
	e2:SetTarget(s.rmlimit)
	c:RegisterEffect(e2)
	--add counter
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCode(EVENT_TO_GRAVE)
	e3:SetOperation(s.ctop)
	c:RegisterEffect(e3)
	--special summon
	local e4=Effect.CreateEffect(c)
	e4:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e4:SetDescription(aux.Stringid(id,0))
	e4:SetType(EFFECT_TYPE_IGNITION)
	e4:SetRange(LOCATION_MZONE)
	e4:SetCost(s.spcost)
	e4:SetTarget(s.sptg)
	e4:SetOperation(s.spop)
	c:RegisterEffect(e4)
end
function s.rmlimit(e,c,p)
	return e:GetHandler()==c
end
function s.ctfilter(c,tp)
	return c:IsControler(tp) and c:IsRace(RACE_DINOSAUR)
end
function s.ctop(e,tp,eg,ep,ev,re,r,rp)
	if eg:IsExists(s.ctfilter,1,nil,tp) then
		e:GetHandler():AddCounter(0x14,2)
	end
end
function s.spcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsReleasable() end
	e:SetLabel(e:GetHandler():GetCounter(0x14))
	Duel.Release(e:GetHandler(),REASON_COST)
end
function s.spfilter(c,lv,e,tp)
	return c:IsLevelBelow(lv) and c:IsRace(RACE_DINOSAUR) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local ft=Duel.GetLocationCount(tp,LOCATION_MZONE)
	if e:GetHandler():GetSequence()<5 then ft=ft+1 end
	if chk==0 then return ft>0 and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_DECK,0,1,nil,e:GetHandler():GetCounter(0x14),e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_DECK,0,1,1,nil,e:GetLabel(),e,tp)
	if #g~=0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end