Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Change 1 face-up Gemini monster you control to face-down Defense Position and negate the activation of an opponent's Spell Card, and destroy it.
--ヴィクティム・カウンター
--Gemini Counter
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_NEGATE+CATEGORY_DESTROY)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_CHAINING)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_card_types={TYPE_GEMINI}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return rp~=tp and re:IsSpellEffect() and re:IsHasType(EFFECT_TYPE_ACTIVATE) and Duel.IsChainNegatable(ev)
end
function s.filter(c)
	return c:IsFaceup() and c:IsType(TYPE_GEMINI) and c:IsCanTurnSet()
end
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_FACEUP)
	Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
	if re:GetHandler():IsDestructable() and re:GetHandler():IsRelateToEffect(re) then
		Duel.SetOperationInfo(0,CATEGORY_DESTROY,eg,1,0,0)
	end
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) and Duel.ChangePosition(tc,POS_FACEDOWN_DEFENSE)~=0 then
		Duel.BreakEffect()
		if Duel.NegateActivation(ev) and re:GetHandler():IsRelateToEffect(re) then
			Duel.Destroy(eg,REASON_EFFECT)
		end
	end
end