Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When a Spellcaster monster declares an attack: Each player Special Summons 1 Spellcaster monster with 2000 or less ATK from their Deck in Attack Position.
--マジシャンズ・サークル
--Magician's Circle
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	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)
	return Duel.GetAttacker():IsRace(RACE_SPELLCASTER)
end
function s.filter(c,e,tp)
	return c:IsAttackBelow(2000) and c:IsRace(RACE_SPELLCASTER) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil,e,tp)
		and Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and Duel.GetLocationCount(1-tp,LOCATION_MZONE)>0 end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)>0 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,1,nil,e,tp)
		local tc=g:GetFirst()
		if tc then Duel.SpecialSummonStep(tc,0,tp,tp,false,false,POS_FACEUP_ATTACK) end
	end
	if Duel.GetLocationCount(1-tp,LOCATION_MZONE)>0 then
		Duel.Hint(HINT_SELECTMSG,1-tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(1-tp,s.filter,1-tp,LOCATION_DECK,0,1,1,nil,e,1-tp)
		local tc=g:GetFirst()
		if tc then Duel.SpecialSummonStep(tc,0,1-tp,1-tp,false,false,POS_FACEUP_ATTACK) end
	end
	Duel.SpecialSummonComplete()
end