Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 4 monsters Once per turn: You can detach 1 Xyz Material from this card, then target 1 face-up monster your opponent controls with ATK less than or equal to this card's; send it to the Graveyard, and if you do, inflict 1000 damage to your opponent. This card cannot attack the turn you activate this effect.
--Ｎｏ．５０ ブラック・コーン号
--Number 50: Blackship of Corn
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Xyz Summon procedure: 2 Level 4 monsters
	Xyz.AddProcedure(c,nil,4,2)
	--Send 1 monster your opponent controls to the GY, and if you do, inflict 1000 damage to them
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOGRAVE+CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCost(Cost.AND(Cost.DetachFromSelf(1),s.tgcost))
	e1:SetTarget(s.tgtg)
	e1:SetOperation(s.tgop)
	c:RegisterEffect(e1)
end
s.xyz_number=50
function s.tgcost(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:GetAttackAnnouncedCount()==0 end
	--This card cannot attack during the turn you activate this effect
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(3206)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE+EFFECT_FLAG_OATH+EFFECT_FLAG_CLIENT_HINT)
	e1:SetCode(EFFECT_CANNOT_ATTACK)
	e1:SetReset(RESETS_STANDARD_PHASE_END)
	c:RegisterEffect(e1)
end
function s.tgfilter(c,atk)
	return c:IsAttackBelow(atk) and c:IsFaceup() and c:IsAbleToGrave()
end
function s.tgtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local atk=e:GetHandler():GetAttack()
	if chkc then return chkc:IsControler(1-tp) and chkc:IsLocation(LOCATION_MZONE) and s.tgfilter(chkc,atk) end
	if chk==0 then return Duel.IsExistingTarget(s.tgfilter,tp,0,LOCATION_MZONE,1,nil,atk) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectTarget(tp,s.tgfilter,tp,0,LOCATION_MZONE,1,1,nil,atk)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,g,1,tp,0)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,1000)
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and Duel.SendtoGrave(tc,REASON_EFFECT)>0
		and tc:IsLocation(LOCATION_GRAVE) then
		Duel.Damage(1-tp,1000,REASON_EFFECT)
	end
end