Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During the Battle Phase: Immediately after this effect resolves, Synchro Summon 1 Synchro Monster using monsters you control.
--緊急同調
--Urgent Tuning
local s,id=GetID()
function s.initial_effect(c)
	--synchro effect
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMING_BATTLE_START|TIMING_BATTLE_END)
	e1:SetCondition(s.sccon)
	e1:SetTarget(s.sctg)
	e1:SetOperation(s.scop)
	c:RegisterEffect(e1)
end
function s.sccon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsBattlePhase()
end
function s.sctg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsSynchroSummonable,tp,LOCATION_EXTRA,0,1,nil,nil) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.scop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(Card.IsSynchroSummonable,tp,LOCATION_EXTRA,0,nil,nil)
	if #g>0 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local sg=g:Select(tp,1,1,nil)
		Duel.SynchroSummon(tp,sg:GetFirst(),nil)
	end
end