Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 LIGHT Machine monsters If this card is Fusion Summoned: You can activate this effect; during the Standby Phase of the next turn, add 1 card from your GY to your hand, with an effect that Fusion Summons a monster(s). When your opponent activates a Spell/Trap Card or effect (Quick Effect): You can banish 1 face-up LIGHT Machine monster you control or 2 LIGHT Machine monsters from your GY; negate the activation. You can only use each effect of "Heosvarog the Mechanical Dawn" once per turn.
--黎銘機ヘオスヴァローグ
--Heosvarog the Mechanical Dawn
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Fusion Materials: 2 LIGHT Machine monsters
	Fusion.AddProcMixN(c,true,true,s.matfilter,2)
	--Add 1 card with an effect that Fusion Summons from your GY to your hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOHAND)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetCondition(function(e) return e:GetHandler():IsFusionSummoned() end)
	e1:SetTarget(s.regtg)
	e1:SetOperation(s.regop)
	c:RegisterEffect(e1)
	--Negate the activation of an opponent's Spell/Trap or effect
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_NEGATE)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e2:SetCode(EVENT_CHAINING)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(function(e,tp,eg,ep,ev,re,r,rp) return ep==1-tp and re:IsSpellTrapEffect() and not e:GetHandler():IsStatus(STATUS_BATTLE_DESTROYED) and Duel.IsChainNegatable(ev) end)
	e2:SetCost(s.negcost)
	e2:SetTarget(s.negtg)
	e2:SetOperation(function(e,tp,eg,ep,ev,re,r,rp) Duel.NegateActivation(ev) end)
	c:RegisterEffect(e2)
	aux.DoubleSnareValidity(c,LOCATION_MZONE)
end
function s.matfilter(c,fc,sumtype,tp)
	return c:IsAttribute(ATTRIBUTE_LIGHT,fc,sumtype,tp) and c:IsRace(RACE_MACHINE,fc,sumtype,tp)
end
function s.regtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetPossibleOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_GRAVE)
end
function s.regop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local turn_ct=Duel.GetTurnCount()
	--Add 1 card with an effect that Fusion Summons from your GY to your hand during the Standby Phase of the next turn
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,2))
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e1:SetCountLimit(1)
	e1:SetCondition(function() return Duel.GetTurnCount()~=turn_ct end)
	e1:SetOperation(s.thop)
	e1:SetReset(RESET_PHASE|PHASE_STANDBY,Duel.GetCurrentPhase()<=PHASE_STANDBY and 2 or 1)
	Duel.RegisterEffect(e1,tp)
end
function s.thfilter(c)
	if not c:IsAbleToHand() then return end
	local effs={c:GetOwnEffects()}
	for _,eff in ipairs(effs) do
		if eff:IsHasCategory(CATEGORY_FUSION_SUMMON) then
			return true
		end
	end
	return false
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_CARD,0,id)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.thfilter),tp,LOCATION_GRAVE,0,1,1,nil)
	if #g>0 then
		Duel.HintSelection(g)
		Duel.SendtoHand(g,nil,REASON_EFFECT)
	end
end
function s.costfilter(c)
	return c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_MACHINE) and c:IsAbleToRemoveAsCost() and c:IsFaceup()
end
function s.rescon(sg,e,tp)
	return (#sg==1 and sg:IsExists(Card.IsLocation,1,nil,LOCATION_MZONE))
		or sg:IsExists(Card.IsLocation,2,nil,LOCATION_GRAVE)
end
function s.negcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.costfilter,tp,LOCATION_MZONE,0,1,nil)
		or Duel.IsExistingMatchingCard(s.costfilter,tp,LOCATION_GRAVE,0,2,nil) end
	local g=Duel.GetMatchingGroup(s.costfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,nil)
	local cg=aux.SelectUnselectGroup(g,e,tp,1,2,s.rescon,1,tp,HINTMSG_REMOVE,s.rescon)
	Duel.Remove(cg,POS_FACEUP,REASON_COST)
end
function s.negtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,tp,0)
end