Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When this card is sent to the GY: You can target 1 face-up monster on the field; equip this card to that target. That monster loses 500 ATK while equipped with this card.
--暗黒魔族ギルファー・デーモン
--Archfiend of Gilfer
local s,id=GetID()
function s.initial_effect(c)
	--equip
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_EQUIP)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_TO_GRAVE)
	e1:SetTarget(s.eqtg)
	e1:SetOperation(s.eqop)
	c:RegisterEffect(e1)
end
function s.eqtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsFaceup() end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingTarget(Card.IsFaceup,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	Duel.SelectTarget(tp,Card.IsFaceup,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,e:GetHandler(),1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_LEAVE_GRAVE,e:GetHandler(),1,0,0)
end
function s.eqlimit(e,c)
	return e:GetOwner()==c
end
function s.eqop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if Duel.GetLocationCount(tp,LOCATION_SZONE)<=0 then return end
	local tc=Duel.GetFirstTarget()
	if c:IsRelateToEffect(e) and tc:IsFaceup() and tc:IsRelateToEffect(e) then
		Duel.Equip(tp,c,tc,true)
		--Add Equip limit
		local e1=Effect.CreateEffect(tc)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_EQUIP_LIMIT)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		e1:SetValue(s.eqlimit)
		c:RegisterEffect(e1)
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_EQUIP)
		e2:SetCode(EFFECT_UPDATE_ATTACK)
		e2:SetValue(-500)
		e2:SetReset(RESET_EVENT|RESETS_STANDARD)
		c:RegisterEffect(e2)
	end
end