Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Target 1 "Primitive Planet Reichphobia" you control or in your GY; return it to the hand, then, if you control "Visas Starfrost", you can change 1 face-up monster your opponent controls to face-down Defense Position. If 3 or more Defense Position monsters are on the field: You can banish this card from your GY; add 1 "Scareclaw" card from your GY to your hand. You can only use this effect of "Scareclaw Decline" once per turn.
--械貶する肆世壊
--Scareclaw Decline
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--Return 1 "Primitive Planet Reichphobia" to the hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--Add 1 "Scareclaw" card from your GY to your hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_TOHAND)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,id)
	e2:SetCondition(s.thcon)
	e2:SetCost(Cost.SelfBanish)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
end
s.listed_names={CARD_VISAS_STARFROST,56063182}
s.listed_series={SET_SCARECLAW}
function s.reichfilter(c)
	return c:IsCode(56063182) and c:IsFaceup() and c:IsAbleToHand()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_ONFIELD|LOCATION_GRAVE) and chkc:IsControler(tp) and s.reichfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.reichfilter,tp,LOCATION_ONFIELD|LOCATION_GRAVE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_RTOHAND)
	local g=Duel.SelectTarget(tp,s.reichfilter,tp,LOCATION_ONFIELD|LOCATION_GRAVE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,g,1,tp,g:GetFirst():GetLocation())
	Duel.SetPossibleOperationInfo(0,CATEGORY_POSITION,nil,1,1-tp,0)
end
function s.posfilter(c)
	return c:IsFaceup() and c:IsCanTurnSet()
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and Duel.SendtoHand(tc,nil,REASON_EFFECT)>0 and tc:IsLocation(LOCATION_HAND)
		and Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsCode,CARD_VISAS_STARFROST),tp,LOCATION_ONFIELD,0,1,nil)
		and Duel.IsExistingMatchingCard(s.posfilter,tp,0,LOCATION_MZONE,1,nil)
		and Duel.SelectYesNo(tp,aux.Stringid(id,2)) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_POSCHANGE)
		local g=Duel.SelectMatchingCard(tp,s.posfilter,tp,0,LOCATION_MZONE,1,1,nil)
		if #g>0 then
			Duel.HintSelection(g,true)
			Duel.BreakEffect()
			Duel.ChangePosition(g,POS_FACEDOWN_DEFENSE)
		end
	end
end
function s.thcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetMatchingGroupCount(Card.IsDefensePos,0,LOCATION_MZONE,LOCATION_MZONE,nil)>=3
end
function s.thfilter(c)
	return c:IsSetCard(SET_SCARECLAW) and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_GRAVE,0,1,e:GetHandler()) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_GRAVE)
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.thfilter,tp,LOCATION_GRAVE,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end