Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be Normal Summoned/Set. Must first be Special Summoned (from your hand) while your opponent controls a "Kaiju" monster. You can only control 1 "Kaiju" monster. Once per turn: You can remove 2 Kaiju Counters from anywhere on the field; equip 1 "Kaiju" monster from your hand or Graveyard to this card. This card gains ATK equal to the combined original ATK of the "Kaiju" monsters equipped to it by this effect.
--対壊獣用決戦兵器スーパーメカドゴラン
--Super Anti-Kaiju War Machine Mecha-Dogoran
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	c:SetUniqueOnField(1,0,aux.FilterBoolFunction(Card.IsSetCard,SET_KAIJU),LOCATION_MZONE)
	--special summon
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_SPSUMMON_PROC)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.spcon)
	c:RegisterEffect(e1)
	--equip
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetCategory(CATEGORY_EQUIP)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1)
	e2:SetCost(s.eqcost)
	e2:SetTarget(s.eqtg)
	e2:SetOperation(s.eqop)
	c:RegisterEffect(e2)
	aux.AddEREquipLimit(c,nil,s.eqval,s.equipop,e2)
	--atk
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e3:SetCode(EFFECT_UPDATE_ATTACK)
	e3:SetRange(LOCATION_MZONE)
	e3:SetValue(s.atkval)
	c:RegisterEffect(e3)
end
s.counter_list={COUNTER_KAIJU}
s.listed_series={SET_KAIJU}
function s.eqval(ec,c,tp)
	return ec:IsControler(tp) and s.eqfilter(ec)
end
function s.spcon(e,c)
	if c==nil then return true end
	local tp=c:GetControler()
	return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsSetCard,SET_KAIJU),tp,0,LOCATION_MZONE,1,nil)
end
function s.eqcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsCanRemoveCounter(tp,1,1,COUNTER_KAIJU,2,REASON_COST) end
	Duel.RemoveCounter(tp,1,1,COUNTER_KAIJU,2,REASON_COST)
end
function s.eqfilter(c)
	return c:IsSetCard(SET_KAIJU) and c:IsMonster() and not c:IsForbidden()
end
function s.eqtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingMatchingCard(s.eqfilter,tp,LOCATION_GRAVE|LOCATION_HAND,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_LEAVE_GRAVE,nil,1,tp,LOCATION_GRAVE|LOCATION_HAND)
end
function s.equipop(c,e,tp,tc)
	c:EquipByEffectAndLimitRegister(e,tp,tc,id,true)
end
function s.eqop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if Duel.GetLocationCount(tp,LOCATION_SZONE)<=0 then return end
	if c:IsFacedown() or not c:IsRelateToEffect(e) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	local g=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.eqfilter),tp,LOCATION_GRAVE|LOCATION_HAND,0,1,1,nil)
	local tc=g:GetFirst()
	if tc then
		s.equipop(c,e,tp,tc)
	end
end
function s.atkfilter(c)
	return c:IsSetCard(SET_KAIJU) and c:GetAttack()>=0 and c:GetFlagEffect(id)~=0
end
function s.atkval(e,c)
	local g=e:GetHandler():GetEquipGroup():Filter(s.atkfilter,nil)
	return g:GetSum(Card.GetAttack)
end