Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn: You can banish 1 DARK monster from your Graveyard to target 1 Level 4 or lower LIGHT monster your opponent controls; equip it to this card. (You can only equip 1 monster at a time to this card with this effect.) If this card on the field would be destroyed, the monster equipped to it with this effect is destroyed, instead.
--闇魔界の戦士長 ダークソード
--Dark Blade the Captain of the Evil World
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_IGNITION)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.eqcon)
	e1:SetCost(s.eqcost)
	e1:SetTarget(s.eqtg)
	e1:SetOperation(s.eqop)
	c:RegisterEffect(e1)
end
function s.eqcon(e,tp,eg,ep,ev,re,r,rp)
	local ec=e:GetLabelObject()
	return ec==nil or ec:GetFlagEffect(id)==0
end
function s.cfilter(c)
	return c:IsAttribute(ATTRIBUTE_DARK) and c:IsAbleToRemoveAsCost() and aux.SpElimFilter(c,true)
end
function s.eqcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,e:GetHandler()) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
	local g=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,1,e:GetHandler())
	Duel.Remove(g,POS_FACEUP,REASON_COST)
end
function s.filter(c)
	return c:IsFaceup() and c:IsLevelBelow(4) and c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsAbleToChangeControler()
end
function s.eqtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and s.filter(chkc) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingTarget(s.filter,tp,0,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	local g=Duel.SelectTarget(tp,s.filter,tp,0,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,g,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()
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsFaceup() and tc:IsRelateToEffect(e) and tc:IsMonster() then
		if not Duel.Equip(tp,tc,c,false) then return end
		--Add Equip limit
		tc:RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD,0,0)
		e:SetLabelObject(tc)
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_EQUIP_LIMIT)
		e1:SetProperty(EFFECT_FLAG_COPY_INHERIT+EFFECT_FLAG_OWNER_RELATE)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		e1:SetValue(s.eqlimit)
		tc:RegisterEffect(e1)
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_EQUIP)
		e2:SetProperty(EFFECT_FLAG_OWNER_RELATE+EFFECT_FLAG_IGNORE_IMMUNE)
		e2:SetCode(EFFECT_DESTROY_SUBSTITUTE)
		e2:SetReset(RESET_EVENT|RESETS_STANDARD)
		e2:SetValue(1)
		tc:RegisterEffect(e2)
	end
end