Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is in your hand: You can return 1 "Starry Knight" monster or 1 Level 7 LIGHT Dragon monster you control to the hand, except "Starry Knight Ciel"; Special Summon this card. If you control no monsters: You can banish this card from your GY; Special Summon 1 Level 7 LIGHT Dragon monster from your hand. You can only use each effect of "Starry Knight Ciel" once per turn.
--ホーリーナイツ・シエル
--Starry Knight Ciel
--Scripted by The Razgriz
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon this card from your hand
	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:SetCountLimit(1,id)
	e1:SetCost(s.spselfcost)
	e1:SetTarget(s.spselftg)
	e1:SetOperation(s.spselfop)
	c:RegisterEffect(e1)
	--Special Summon 1 LIGHT Level 7 Dragon monster from your hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(s.spcon)
	e2:SetCost(Cost.SelfBanish)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
s.listed_names={id}
s.listed_series={SET_STARRY_KNIGHT}
function s.ldlv7filter(c)
	return c:IsLevel(7) and c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_DRAGON)
end
function s.spcfilter(c,tp)
	return (s.ldlv7filter(c) or c:IsSetCard(SET_STARRY_KNIGHT)) and c:IsFaceup() and c:IsAbleToHandAsCost() and not c:IsCode(id)
		and Duel.GetMZoneCount(tp,c)>0
end
function s.spselfcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.spcfilter,tp,LOCATION_MZONE,0,1,nil,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_RTOHAND)
	local g=Duel.SelectMatchingCard(tp,s.spcfilter,tp,LOCATION_MZONE,0,1,1,nil,tp)
	Duel.SendtoHand(g,nil,REASON_COST)
end
function s.spselftg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsCanBeSpecialSummoned(e,0,tp,false,false) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,c,1,0,0)
end
function s.spselfop(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.spcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetFieldGroupCount(tp,LOCATION_MZONE,0)==0
end
function s.spfilter(c,e,tp)
	return s.ldlv7filter(c) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
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 Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,false,POS_FACEUP)
	end
end