Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When a Level 4 or lower monster(s) is Special Summoned (except during the Damage Step): You can Special Summon this card from your hand. Once per turn, during the End Phase, if this card is in the GY because it was destroyed on the field and sent there this turn: You can add 1 "T.G." monster from your Deck to your hand, except "T.G. Warwolf".
--TG ワーウルフ
--T.G. Warwolf
local s,id=GetID()
function s.initial_effect(c)
	--spsummon
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetRange(LOCATION_HAND)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--to grave
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_CONTINUOUS)
	e2:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetOperation(s.regop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_TG}
s.listed_names={id}
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(aux.FaceupFilter(Card.IsLevelBelow,4),1,nil)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and e:GetHandler():IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if (c:GetPreviousLocation()&LOCATION_ONFIELD)~=0 and c:IsReason(REASON_DESTROY) then
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(aux.Stringid(id,1))
		e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
		e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
		e1:SetCode(EVENT_PHASE+PHASE_END)
		e1:SetCountLimit(1)
		e1:SetRange(LOCATION_GRAVE)
		e1:SetTarget(s.thtg)
		e1:SetOperation(s.thop)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		c:RegisterEffect(e1)
	end
end
function s.filter(c)
	return c:IsSetCard(SET_TG) and not c:IsCode(id) and c:IsMonster() and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end