Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If a monster(s) is Special Summoned to your field face-up (except during the Damage Step): You can target 1 of them; Special Summon this card from your hand, and if you do, change that monster to face-down Defense Position. If this card is sent from the hand or field to the GY: You can target 1 monster on the field; change it to face-up Attack Position or face-down Defense Position. You can only use each effect of "Green Ninja" once per turn.
--若い忍者
--Green Ninja
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon this card
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--Change a monster to face-up Attack or face-down Defense Position
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_POSITION)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(function(e) return e:GetHandler():IsPreviousLocation(LOCATION_HAND|LOCATION_ONFIELD) end)
	e2:SetTarget(s.postg)
	e2:SetOperation(s.posop)
	c:RegisterEffect(e2)
end
function s.cfilter(c,tp,e)
	return c:IsFaceup() and c:IsControler(tp) and c:IsCanTurnSet() and c:IsLocation(LOCATION_MZONE) and c:IsCanBeEffectTarget(e)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.cfilter,1,nil,tp,e)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return eg:IsContains(chkc) and s.cfilter(chkc,tp,e) end
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
		and eg:IsExists(s.cfilter,1,nil,tp,e) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	local tg=eg:FilterSelect(tp,s.cfilter,1,1,nil,tp,e)
	Duel.SetTargetCard(tg)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,tg,1,tp,POS_FACEDOWN_DEFENSE)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)>0 then
		local tc=Duel.GetFirstTarget()
		if tc:IsRelateToEffect(e) and tc:IsFaceup() then
			Duel.ChangePosition(tc,POS_FACEDOWN_DEFENSE)
		end
	end
end
function s.posfilter(c)
	return c:IsCanTurnSet() or not c:IsPosition(POS_FACEUP_ATTACK)
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and s.posfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.posfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	local g=Duel.SelectTarget(tp,s.posfilter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,1,tp,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not tc:IsRelateToEffect(e) then return end
	local opt=0
	if (tc:IsPosition(POS_FACEDOWN) or tc:IsType(TYPE_TOKEN)) then
		opt=POS_FACEUP_ATTACK
	elseif tc:IsPosition(POS_FACEUP_ATTACK) then
		opt=POS_FACEDOWN_DEFENSE
	elseif tc:IsPosition(POS_FACEUP_DEFENSE) then
		opt=POS_FACEUP_ATTACK|POS_FACEDOWN_DEFENSE
	end
	if opt==0 then return end
	local pos=Duel.SelectPosition(tp,tc,opt)
	if pos==0 then return end
	Duel.ChangePosition(tc,pos)
end