Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn, at the start of the Damage Step, when an Insect monster battles: You can target 1 card you control and 1 card your opponent controls; destroy them. You can only use each of the following effects of "Infinite Antlion" once per turn. When an opponent's monster declares an attack: You can Special Summon this card from your hand. If this card is Normal or Special Summoned: You can equip 1 Insect monster from your hand or GY to this card as an Equip Spell that gives it 500 ATK/DEF.
--ジャイアント・メサイア
--Infinite Antlion
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--Destroy cards if an Insect monster battles
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_BATTLE_START)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.descon)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--Special Summon itself from the hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_ATTACK_ANNOUNCE)
	e2:SetRange(LOCATION_HAND)
	e2:SetCountLimit(1,id)
	e2:SetCondition(function(_,tp) return Duel.GetAttacker():IsControler(1-tp) end)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
	--Equip 1 Insect monster to itself
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,2))
	e3:SetCategory(CATEGORY_EQUIP)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_SUMMON_SUCCESS)
	e3:SetCountLimit(1,{id,1})
	e3:SetTarget(s.eqtg)
	e3:SetOperation(s.eqop)
	c:RegisterEffect(e3)
	local e4=e3:Clone()
	e4:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e4)
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	local a,b=Duel.GetAttacker(),Duel.GetAttackTarget()
	return (a and a:IsRace(RACE_INSECT)) or (b and b:IsFaceup() and b:IsRace(RACE_INSECT))
end
function s.rescon(sg,e,tp,mg)
	return sg:FilterCount(Card.IsControler,nil,tp)==1
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	local g=Duel.GetMatchingGroup(Card.IsCanBeEffectTarget,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,nil,e)
	if chk==0 then return aux.SelectUnselectGroup(g,e,tp,2,2,s.rescon,0) end
	local dg=aux.SelectUnselectGroup(g,e,tp,2,2,s.rescon,1,tp,HINTMSG_TARGET)
	Duel.SetTargetCard(dg)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,dg,#dg,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local g=Duel.GetTargetCards(e)
	if #g>0 then
		Duel.Destroy(g,REASON_EFFECT)
	end
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,tp,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)
	end
end
function s.eqfilter(c,tp)
	return c:IsRace(RACE_INSECT) and c:CheckUniqueOnField(tp) and not c:IsForbidden()
end
function s.eqtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingMatchingCard(s.eqfilter,tp,LOCATION_HAND|LOCATION_GRAVE,0,1,nil,tp) end
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,nil,1,tp,LOCATION_HAND|LOCATION_GRAVE)
end
function s.eqop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not (c:IsFaceup() and c:IsRelateToEffect(e) and Duel.GetLocationCount(tp,LOCATION_SZONE)>0) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	local ec=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.eqfilter),tp,LOCATION_HAND|LOCATION_GRAVE,0,1,1,nil,tp):GetFirst()
	if ec then
		s.equipop(c,e,tp,ec)
	end
end
function s.equipop(c,e,tp,tc)
	if not c:EquipByEffectAndLimitRegister(e,tp,tc,nil,true) then return end
	--ATK/DEF increase
	local e1=Effect.CreateEffect(tc)
	e1:SetType(EFFECT_TYPE_EQUIP)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(500)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	tc:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_UPDATE_DEFENSE)
	tc:RegisterEffect(e2)
	--Equip limit
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_SINGLE)
	e3:SetCode(EFFECT_EQUIP_LIMIT)
	e3:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e3:SetValue(function(e,c) return c==e:GetLabelObject() end)
	e3:SetLabelObject(c)
	e3:SetReset(RESET_EVENT|RESETS_STANDARD)
	tc:RegisterEffect(e3)
end