Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Special Summon this card as an Effect Monster (Fiend/DARK/Level 6/ATK 1000/DEF 2400). (This card is also still a Trap.) If Summoned this way: You can discard 1 card, then declare 1 Attribute; this card becomes that Attribute, and can be treated as 2 Tributes for the Tribute Summon of a monster with the same Attribute as this card. If this card was Summoned this way, you cannot Special Summon monsters, except monsters with this card's Attribute.
--始源の帝王
--The First Monarch
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--change attribute
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCondition(s.chcon)
	e2:SetCost(s.chcost)
	e2:SetTarget(s.chtg)
	e2:SetOperation(s.chop)
	c:RegisterEffect(e2)
	--sum limit
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_FIELD)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetTargetRange(1,0)
	e3:SetCondition(s.chcon)
	e3:SetTarget(s.splimit)
	c:RegisterEffect(e3)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsPlayerCanSpecialSummonMonster(tp,id,0,TYPE_MONSTER|TYPE_EFFECT,1000,2400,6,RACE_FIEND,ATTRIBUTE_DARK) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,e:GetHandler(),1,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0
		or not Duel.IsPlayerCanSpecialSummonMonster(tp,id,0,TYPE_MONSTER|TYPE_EFFECT,1000,2400,6,RACE_FIEND,ATTRIBUTE_DARK) then return end
	c:AddMonsterAttribute(TYPE_EFFECT+TYPE_TRAP)
	Duel.SpecialSummonStep(c,1,tp,tp,true,false,POS_FACEUP)
	c:AddMonsterAttributeComplete()
	Duel.SpecialSummonComplete()
end
function s.chcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetSummonType()==SUMMON_TYPE_SPECIAL+1
end
function s.chcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST|REASON_DISCARD)
end
function s.chtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,0)
	local aat=Duel.AnnounceAttribute(tp,1,ATTRIBUTE_ALL)
	e:SetLabel(aat)
end
function s.chop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local att=e:GetLabel()
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_COPY_INHERIT)
	e1:SetCode(EFFECT_CHANGE_ATTRIBUTE)
	e1:SetValue(att)
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	c:RegisterEffect(e1)
	--double tribute
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_DOUBLE_TRIBUTE)
	e2:SetValue(s.condition)
	e2:SetReset(RESET_EVENT|RESETS_STANDARD)
	c:RegisterEffect(e2)
end
function s.condition(e,c)
	return c:IsAttribute(e:GetHandler():GetAttribute())
end
function s.splimit(e,c,tp,sumtp,sumpos)
	return c:IsAttribute(ATTRIBUTE_ALL&~(e:GetHandler():GetAttribute()))
end