Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Activate only when an effect that inflicts damage is activated. Negate its activation and effect, and randomly send 1 Fusion Monster from your Extra Deck to the Graveyard.
--フュージョン・ガード
--Fusion Guard
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_NEGATE+CATEGORY_TOGRAVE)
	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
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	local ex=Duel.GetOperationInfo(ev,CATEGORY_DAMAGE)
	return ex and (re:IsMonsterEffect() or re:IsHasType(EFFECT_TYPE_ACTIVATE)) and Duel.IsChainNegatable(ev)
end
function s.filter(c)
	return c:IsType(TYPE_FUSION) and c:IsAbleToGrave()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_EXTRA,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,tp,LOCATION_EXTRA)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.NegateActivation(ev) and re:IsHasType(EFFECT_TYPE_ACTIVATE) and re:GetHandler():IsRelateToEffect(re) then
		Duel.SendtoGrave(eg,REASON_EFFECT)
	end
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_EXTRA,0,nil):RandomSelect(tp,1)
	Duel.SendtoGrave(g,REASON_EFFECT)
end