Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Can be treated as 2 Tributes for the Tribute Summon of a Dragon monster. Once per turn, during your Standby Phase, if this card is in your GY and all monsters in your GY are Dragon: You can Special Summon this card in Attack Position, but banish it when it leaves the field. You must control no monsters to activate and to resolve this effect.
--ミンゲイドラゴン
--Totem Dragon
local s,id=GetID()
function s.initial_effect(c)
	--Treated as 2 tributes for tribute summon of a dragon monster
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_DOUBLE_TRIBUTE)
	e1:SetValue(s.dccon)
	c:RegisterEffect(e1)
	--Special summon itself from GY
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetType(EFFECT_TYPE_TRIGGER_O+EFFECT_TYPE_FIELD)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1)
	e2:SetCondition(s.spcon)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
function s.dccon(e,c)
	return c:IsRace(RACE_DRAGON)
end
function s.cfilter(c)
	return c:IsMonster() and not c:IsRace(RACE_DRAGON)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return tp==Duel.GetTurnPlayer() and Duel.GetFieldGroupCount(tp,LOCATION_MZONE,0)==0
		and not Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_GRAVE,0,1,nil)
end
function s.sptg(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(),1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and Duel.GetFieldGroupCount(tp,LOCATION_MZONE,0)==0
		and not Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_GRAVE,0,1,nil) then
		Duel.SpecialSummon(c,0,tp,tp,false,false,POS_FACEUP_ATTACK)
		--Banish it if it leaves the field
		local e1=Effect.CreateEffect(c)
		e1:SetDescription(3300)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_LEAVE_FIELD_REDIRECT)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_CLIENT_HINT)
		e1:SetReset(RESET_EVENT|RESETS_REDIRECT)
		e1:SetValue(LOCATION_REMOVED)
		c:RegisterEffect(e1,true)
	end
end