Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During the Main Phase, if you have a Reptile monster in your GY (Quick Effect): You can send this card from your hand to the GY, then target 1 face-up monster your opponent controls; change its ATK to 0. If your opponent controls a monster with 0 ATK: You can Special Summon this card from your GY. You can only use 1 "Reptilianne Nyami" effect per turn, and only once that turn.
--レプティレス・ニャミニ
--Reptilianne Nyami
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--Change ATK to 0
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_ATKCHANGE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER|TIMING_MAIN_END)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.condition)
	e1:SetCost(Cost.SelfToGrave)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--Special Summon this card
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
--Functions for zero ATK effect
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsMainPhase() and Duel.IsExistingMatchingCard(Card.IsRace,tp,LOCATION_GRAVE,0,1,nil,RACE_REPTILE)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE) and chkc:HasNonZeroAttack() end
	if chk==0 then return Duel.IsExistingTarget(Card.HasNonZeroAttack,tp,0,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,Card.HasNonZeroAttack,tp,0,LOCATION_MZONE,1,1,nil)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_SET_ATTACK_FINAL)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		e1:SetValue(0)
		tc:RegisterEffect(e1)
	end
end
--Functions for Special Summon effect
function s.spfilter(c)
	return c:IsFaceup() and c:IsAttack(0)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(s.spfilter,tp,0,LOCATION_MZONE,1,nil)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,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_FACEUP)
	end
end