Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
1 LIGHT or DARK Dragon monster + 1 Dragon monster If this card is Fusion Summoned: You can target cards your opponent controls, up to the number of your LIGHT and DARK monsters used as this card's material; destroy them. If this card is banished: You can target 1 Level 4 LIGHT or DARK Dragon monster you control; its Level becomes 8. You can only use each effect of "Khaos Starsource Dragon" once per turn.
--空隙の原星竜
--Khaos Starsource Dragon
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Fusion Materials: 1 LIGHT or DARK Dragon monster + 1 Dragon monster
	Fusion.AddProcMix(c,true,true,s.matfilter,aux.FilterBoolFunctionEx(Card.IsRace,RACE_DRAGON))
	--Destroy cards your opponent controls up to the number of your LIGHT and DARK monsters used as this card's Fusion Material
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetCondition(function(e) return e:GetHandler():IsFusionSummoned() and e:GetLabel()>0 end)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--Register the materials used
	local e1a=Effect.CreateEffect(c)
	e1a:SetType(EFFECT_TYPE_SINGLE)
	e1a:SetCode(EFFECT_MATERIAL_CHECK)
	e1a:SetValue(s.valcheck)
	e1a:SetLabelObject(e1)
	c:RegisterEffect(e1a)
	--Make 1 Level 4 LIGHT or DARK Dragon monster you control become Level 8
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_LVCHANGE)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e2:SetCode(EVENT_REMOVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetTarget(s.lvtg)
	e2:SetOperation(s.lvop)
	c:RegisterEffect(e2)
end
function s.matfilter(c,fc,st,tp)
	return c:IsAttribute(ATTRIBUTE_LIGHT|ATTRIBUTE_DARK,fc,st,tp) and c:IsRace(RACE_DRAGON,fc,st,tp)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsOnField() and chkc:IsControler(1-tp) end
	if chk==0 then return Duel.IsExistingTarget(nil,tp,0,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,nil,tp,0,LOCATION_ONFIELD,1,e:GetLabel(),nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,#g,tp,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tg=Duel.GetTargetCards(e)
	if #tg>0 then
		Duel.Destroy(tg,REASON_EFFECT)
	end
end
function s.valcheckfilter(c,fc,tp)
	return c:IsAttribute(ATTRIBUTE_LIGHT|ATTRIBUTE_DARK,fc,SUMMON_TYPE_FUSION,tp) and c:IsControler(tp)
end
function s.valcheck(e,c)
	local ct=c:GetMaterial():FilterCount(s.valcheckfilter,nil,c,e:GetHandlerPlayer())
	e:GetLabelObject():SetLabel(ct)
end
function s.lvfilter(c)
	return c:IsLevel(4) and c:IsAttribute(ATTRIBUTE_LIGHT|ATTRIBUTE_DARK) and c:IsRace(RACE_DRAGON) and c:IsFaceup()
end
function s.lvtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_MZONE) and s.lvfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.lvfilter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	local g=Duel.SelectTarget(tp,s.lvfilter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_LVCHANGE,g,1,tp,8)
end
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) and tc:HasLevel() and not tc:IsLevel(8) then
		--Its Level becomes 8
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_CHANGE_LEVEL)
		e1:SetValue(8)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1)
	end
end