Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Normal Summoned/Set. Must be Special Summoned by a card effect. If a monster is sent from your opponent's hand or Deck to the GY (except during the Damage Step): You can Special Summon this card from your hand in face-down Defense Position. If this card is flipped face-up: You can target up to 2 cards on the field; destroy them.
--礫岩の霊長－コングレード
--Primineral Kongreat
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	c:EnableUnsummonable()
	--Special Summon limit
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_UNCOPYABLE)
	e1:SetCode(EFFECT_SPSUMMON_CONDITION)
	e1:SetValue(s.splimit)
	c:RegisterEffect(e1)
	--Special summon itself from the hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetRange(LOCATION_HAND)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
	--Destroy when flipped
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DESTROY)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_FLIP)
	e3:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_CARD_TARGET)
	e3:SetTarget(s.destg)
	e3:SetOperation(s.desop)
	c:RegisterEffect(e3)
end
function s.splimit(e,se,sp,st)
	return se:IsHasType(EFFECT_TYPE_ACTIONS)
end
function s.cfilter(c,tp)
	return c:IsMonster() and c:GetPreviousControler()==1-tp and (c:IsPreviousLocation(LOCATION_DECK) or c:IsPreviousLocation(LOCATION_HAND))
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil,tp)
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,POS_FACEDOWN_DEFENSE) 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 c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEDOWN_DEFENSE)
	end
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_ONFIELD) end
	if chk==0 then return Duel.IsExistingTarget(aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.TRUE,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,2,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g>0 then
		Duel.Destroy(g,REASON_EFFECT)
	end
end