Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When this card is activated: You can add 1 monster that mentions "Ancient Fairy Dragon" from your Deck to your hand. You can only activate the following effects while you control a Level 7 or higher LIGHT Dragon Synchro Monster. Each time a monster(s) is Special Summoned in Attack Position: Change it to Defense Position. Once per turn, during the End Phase: Destroy all Attack Position monsters on the turn player's field. You can only activate 1 "World of Spirits" per turn.
--精霊の世界
--World of Spirits
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--Change any monster that is Special Summoned in Attack Position to Defense Position
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_POSITION)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetRange(LOCATION_FZONE)
	e2:SetCondition(s.lightdragonsynchrocon)
	e2:SetTarget(s.postg)
	e2:SetOperation(s.posop)
	c:RegisterEffect(e2)
	--Destroy all the turn player's Attack Position monsters
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,2))
	e3:SetCategory(CATEGORY_DESTROY)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetCode(EVENT_PHASE+PHASE_END)
	e3:SetRange(LOCATION_FZONE)
	e3:SetCountLimit(1)
	e3:SetCondition(s.lightdragonsynchrocon)
	e3:SetTarget(s.destg)
	e3:SetOperation(s.desop)
	c:RegisterEffect(e3)
end
s.listed_names={CARD_ANCIENT_FAIRY_DRAGON}
function s.thfilter(c)
	return c:IsMonster() and c:ListsCode(CARD_ANCIENT_FAIRY_DRAGON) and c:IsAbleToHand()
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil)
		and Duel.SelectYesNo(tp,aux.Stringid(id,3)) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
		if #g>0 then
			Duel.SendtoHand(g,nil,REASON_EFFECT)
			Duel.ConfirmCards(1-tp,g)
		end
	end
end
function s.lightdragonsynchroconfilter(c)
	return c:IsLevelAbove(7) and c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_DRAGON) and c:IsType(TYPE_SYNCHRO) and c:IsFaceup()
end
function s.lightdragonsynchrocon(e,tp,eg,ev,ep,re,r,rp)
	return Duel.IsExistingMatchingCard(s.lightdragonsynchroconfilter,tp,LOCATION_MZONE,0,1,nil)
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk)
	local g=eg:Filter(Card.IsPosition,nil,POS_ATTACK)
	if chk==0 then return #g>0 end
	Duel.SetTargetCard(g)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,#g,tp,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e):Filter(Card.IsPosition,nil,POS_ATTACK)
	if #g>0 then
		Duel.ChangePosition(g,POS_FACEUP_DEFENSE,POS_FACEDOWN_DEFENSE)
	end
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local g=Duel.GetMatchingGroup(Card.IsPosition,Duel.GetTurnPlayer(),LOCATION_MZONE,0,nil,POS_ATTACK)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,tp,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(Card.IsPosition,Duel.GetTurnPlayer(),LOCATION_MZONE,0,nil,POS_ATTACK)
	if #g>0 then
		Duel.Destroy(g,REASON_EFFECT)
	end
end