Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
This card must attack, if able. If this card is targeted for an attack: Change the battle position of this card. (Quick Effect): You can banish this card from your GY, then target 1 "Karakuri" monster you control; change its battle position. You can only use this effect of "Karakuri Gama mdl 4624 "Shirokunishi"" once per turn.
--カラクリ蝦蟇 四六弐四
--Karakuri Gama mdl 4624 "Shirokunishi"
--scripted by Logical Nonsense
--Substitute ID
local s,id=GetID()
function s.initial_effect(c)
	--Must attack
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_MUST_ATTACK)
	c:RegisterEffect(e1)
	--Position change
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_POSITION)
	e2:SetType(EFFECT_TYPE_TRIGGER_F+EFFECT_TYPE_SINGLE)
	e2:SetCode(EVENT_BE_BATTLE_TARGET)
	e2:SetOperation(s.posop)
	c:RegisterEffect(e2)
	--Position change, quick effect
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_POSITION)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e3:SetType(EFFECT_TYPE_QUICK_O)
	e3:SetCode(EVENT_FREE_CHAIN)
	e3:SetCountLimit(1,id)
	e3:SetRange(LOCATION_GRAVE)
	e3:SetCost(Cost.SelfBanish)
	e3:SetTarget(s.target)
	e3:SetOperation(s.operation)
	c:RegisterEffect(e3)
end
s.listed_series={SET_KARAKURI}
	--Switch battle position
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsFaceup() and c:IsRelateToEffect(e) then
		Duel.ChangePosition(c,POS_FACEUP_DEFENSE,0,POS_FACEUP_ATTACK,0)
	end
end
	--Check for "Karakuri" monster that can switch position
function s.filter(c)
	return c:IsFaceup() and c:IsSetCard(SET_KARAKURI) and c:IsCanChangePosition()
end
	--Activation legality
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_POSCHANGE)
	local g=Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,1,0,0)
end
	--Switch 1 "Karakuri" monster's battle position
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) then
		Duel.ChangePosition(tc,POS_FACEUP_DEFENSE,POS_FACEUP_ATTACK,POS_FACEUP_ATTACK,POS_FACEUP_ATTACK)
	end
end