Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
4 Level 5 monsters If this card destroys a monster by battle and sends it to the GY: Inflict damage to your opponent equal to half the destroyed monster's original ATK. If this card has "Number 105: Battlin' Boxer Star Cestus" as material, it gains this effect. ● Once per turn: You can detach 1 material from this card, then target 1 monster your opponent controls; destroy it, and if you destroyed a face-up monster, inflict damage to your opponent equal to the ATK that monster had on the field. * The above text is unofficial and describes the card's functionality in the OCG.
--CNo.105 BK 彗星のカエストス
--Number C105: Battlin' Boxer Comet Cestus
local s,id=GetID()
function s.initial_effect(c)
	--xyz summon
	Xyz.AddProcedure(c,nil,5,4)
	c:EnableReviveLimit()
	--damage
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DAMAGE)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_F)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetCode(EVENT_BATTLE_DESTROYING)
	e1:SetCondition(s.damcon)
	e1:SetTarget(s.damtg)
	e1:SetOperation(s.damop)
	c:RegisterEffect(e1)
	--destroy
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_DESTROY+CATEGORY_DAMAGE)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCountLimit(1)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCondition(s.descon)
	e2:SetCost(Cost.DetachFromSelf(1))
	e2:SetTarget(s.destg)
	e2:SetOperation(s.desop)
	c:RegisterEffect(e2)
end
s.xyz_number=105
s.listed_names={59627393}
function s.damcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local bc=c:GetBattleTarget()
	return c:IsRelateToBattle() and bc:IsLocation(LOCATION_GRAVE) and bc:IsMonster()
end
function s.damtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local c=e:GetHandler()
	local bc=c:GetBattleTarget()
	local dam=bc:GetTextAttack()/2
	if dam<0 then dam=0 end
	Duel.SetTargetPlayer(1-tp)
	Duel.SetTargetParam(dam)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,dam)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Damage(p,d,REASON_EFFECT)
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():GetOverlayGroup():IsExists(Card.IsCode,1,nil,59627393)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) end
	if chk==0 then return Duel.IsExistingTarget(aux.TRUE,tp,0,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,aux.TRUE,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,g:GetFirst():GetAttack())
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsControler(1-tp) then
		local atk=tc:GetAttack()
		if atk<0 or tc:IsFacedown() then atk=0 end
		if Duel.Destroy(tc,REASON_EFFECT)~=0 then
			Duel.Damage(1-tp,atk,REASON_EFFECT)
		end
	end
end