Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Equip only to a "Dragunity" monster. It gains ATK equal to its Level x 100, also it is unaffected by Trap effects. During your Main Phase: You can equip 1 Dragon-Type "Dragunity" Tuner monster from your Deck to the monster equipped with this card. You can only use this effect of "Dragunity Divine Lance" once per turn.
--ドラグニティの神槍
--Dragunity Divine Lance
local s,id=GetID()
function s.initial_effect(c)
	aux.AddEquipProcedure(c,nil,aux.FilterBoolFunction(Card.IsSetCard,SET_DRAGUNITY))
	--atk
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_EQUIP)
	e3:SetCode(EFFECT_UPDATE_ATTACK)
	e3:SetValue(s.atkval)
	c:RegisterEffect(e3)
	--immune
	local e4=Effect.CreateEffect(c)
	e4:SetType(EFFECT_TYPE_EQUIP)
	e4:SetCode(EFFECT_IMMUNE_EFFECT)
	e4:SetValue(s.efilter)
	c:RegisterEffect(e4)
	--equip
	local e5=Effect.CreateEffect(c)
	e5:SetCategory(CATEGORY_EQUIP)
	e5:SetType(EFFECT_TYPE_IGNITION)
	e5:SetRange(LOCATION_SZONE)
	e5:SetCountLimit(1,id)
	e5:SetTarget(s.eqtg)
	e5:SetOperation(s.eqop)
	c:RegisterEffect(e5)
end
s.listed_series={SET_DRAGUNITY}
function s.atkval(e,c)
	return c:GetLevel()*100
end
function s.efilter(e,re)
	return re:IsTrapEffect()
end
function s.eqfilter(c)
	return c:IsSetCard(SET_DRAGUNITY) and c:IsRace(RACE_DRAGON) and c:IsType(TYPE_TUNER) and not c:IsForbidden()
end
function s.eqtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingMatchingCard(s.eqfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,nil,1,tp,LOCATION_DECK)
end
function s.eqop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_SZONE)<=0 then return end
	local c=e:GetHandler()
	local ec=c:GetEquipTarget()
	if c:IsRelateToEffect(e) and ec:IsFaceup() then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
		local g=Duel.SelectMatchingCard(tp,s.eqfilter,tp,LOCATION_DECK,0,1,1,nil)
		local tc=g:GetFirst()
		if not tc or not Duel.Equip(tp,tc,ec,true) then return end
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_EQUIP_LIMIT)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		e1:SetValue(s.eqlimit2)
		e1:SetLabelObject(ec)
		tc:RegisterEffect(e1)
	end
end
function s.eqlimit2(e,c)
	return c==e:GetLabelObject()
end