Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When an opponent's monster declares an attack: You can send this card from your hand to the GY; change the attacking monster to Defense Position. When you Ritual Summon, you can banish this card from your GY as 1 of the monsters required for the Ritual Summon.
--クリボール
--Sphere Kuriboh
local s,id=GetID()
function s.initial_effect(c)
	--pos
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.condition)
	e1:SetCost(Cost.SelfToGrave)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	--ritual material
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e2:SetCode(EFFECT_EXTRA_RITUAL_MATERIAL)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCondition(s.con)
	e2:SetValue(1)
	c:RegisterEffect(e2)
end
function s.con(e)
	return not Duel.IsPlayerAffectedByEffect(e:GetHandlerPlayer(),CARD_SPIRIT_ELIMINATION)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetAttacker():IsControler(1-tp)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		local at=Duel.GetAttacker()
		return at:IsAttackPos() and at:IsCanChangePosition()
	end
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local at=Duel.GetAttacker()
	if at and at:IsAttackPos() and at:IsRelateToBattle() then
		Duel.ChangePosition(at,POS_FACEUP_DEFENSE)
	end
end