Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 6 monsters Cannot be destroyed by battle or card effect while a monster, other than "Dragonlark Pairen", is face-up on the field that was Special Summoned from the GY. During the Standby Phase: You can detach 1 material from this card, then target 1 Level 5 or lower monster in your GY; Special Summon it. You can only use this effect of "Dragonlark Pairen" once per turn.
--告天子竜パイレン
--Dragonlark Pairen
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--Must be properly summoned before reviving
	c:EnableReviveLimit()
	--Xyz summon procedure
	Xyz.AddProcedure(c,nil,6,2)
	--Indestructible while monster from GY is on field
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e1:SetCondition(s.indescon)
	e1:SetValue(1)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_INDESTRUCTABLE_EFFECT)
	c:RegisterEffect(e2)
	--Special Summon Level 5 or lower monster from GY
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e3:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1,id)
	e3:SetCost(Cost.DetachFromSelf(1))
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
s.listed_names={id}
	--Filter for cards summoned from GY
function s.indesfil(c)
	return c:IsSummonLocation(LOCATION_GRAVE) and c:IsFaceup() and not c:IsCode(id)
end
	--Condition check to see if monsters besides itself are on the field
function s.indescon(e)
	return Duel.IsExistingMatchingCard(s.indesfil,0,LOCATION_MZONE,LOCATION_MZONE,1,nil)
end
	--Detach 1 material as cost
	--filter for Level 5 or lower monsters
function s.spfilter(c,e,tp)
	return c:IsLevelBelow(5) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
	--Activation legality
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
	--Special Summon 
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
	end
end