Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If only your opponent controls a monster: You can Special Summon this card from your hand. Your opponent cannot target other "Ancient Warriors" monsters you control with card effects. If your opponent controls more monsters than you do: You can target 1 monster your opponent controls; destroy it. You can only use this effect of "Ancient Warriors - Loyal Guan Yun" once per turn.
--戦華の義－関雲
--Ancient Warriors - Loyal Guan Yun
--Scripted by Larry126
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon itself
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCondition(s.sscon)
	e1:SetTarget(s.sstg)
	e1:SetOperation(s.ssop)
	c:RegisterEffect(e1)
	--"Ancient Warrior" monsters cannot be targeted
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_CANNOT_BE_EFFECT_TARGET)
	e2:SetRange(LOCATION_MZONE)
	e2:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetTarget(s.tgtg)
	e2:SetValue(aux.tgoval)
	c:RegisterEffect(e2)
	--Destroy 1 monster
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DESTROY)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e3:SetCountLimit(1,id)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCondition(s.descon)
	e3:SetTarget(s.destg)
	e3:SetOperation(s.desop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_ANCIENT_WARRIORS}
function s.sscon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingMatchingCard(aux.TRUE,tp,0,LOCATION_MZONE,1,nil) and not Duel.IsExistingMatchingCard(aux.TRUE,tp,LOCATION_MZONE,0,1,nil)
end
function s.sstg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and e:GetHandler():IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,LOCATION_HAND)
end
function s.ssop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP)
end
function s.tgtg(e,c)
	return c:IsSetCard(SET_ANCIENT_WARRIORS) and c~=e:GetHandler()
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetFieldGroupCount(tp,0,LOCATION_MZONE)>Duel.GetFieldGroupCount(tp,LOCATION_MZONE,0)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) end
	if chk==0 then return Duel.IsExistingTarget(aux.TRUE,tp,0,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.TRUE,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.Destroy(tc,REASON_EFFECT)
	end
end