Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
1 Tuner + 1+ non-Tuner monsters You can Tribute this card, then target 3 other Synchro Monsters in your GY; return them to the Extra Deck. You can target 1 monster you control Special Summoned from the Extra Deck; equip this card from your GY to it. When an attack is declared involving the monster equipped with this card: You can draw 1 card. You can only use each effect of "Gaiarmor Dragonshell" once per turn.
--甲纏竜ガイアーム
--Gaiarmor Dragonshell
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--Synchro Summon procedure
	c:EnableReviveLimit()
	Synchro.AddProcedure(c,nil,1,1,Synchro.NonTuner(nil),1,99)
	--Return 3 Synchros to the Extra Deck
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOEXTRA)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1,id)
	e1:SetCost(Cost.SelfTribute)
	e1:SetTarget(s.tdtg)
	e1:SetOperation(s.tdop)
	c:RegisterEffect(e1)
	--Equip itself
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_EQUIP)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetTarget(s.eqtg)
	e2:SetOperation(s.eqop)
	c:RegisterEffect(e2)
	--Draw 1 card
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,2))
	e3:SetCategory(CATEGORY_DRAW)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetCode(EVENT_ATTACK_ANNOUNCE)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1,{id,2})
	e3:SetCondition(s.drcon)
	e3:SetTarget(s.drtg)
	e3:SetOperation(s.drop)
	c:RegisterEffect(e3)
end
function s.tdfilter(c)
	return c:IsType(TYPE_SYNCHRO) and c:IsAbleToExtra()
end
function s.tdtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local c=e:GetHandler()
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.tdfilter(chkc) and chkc~=c end
	if chk==0 then return Duel.IsExistingTarget(s.tdfilter,tp,LOCATION_GRAVE,0,3,c) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TODECK)
	local g=Duel.SelectTarget(tp,s.tdfilter,tp,LOCATION_GRAVE,0,3,3,c)
	Duel.SetOperationInfo(0,CATEGORY_TOEXTRA,g,3,0,0)
end
function s.tdop(e,tp,eg,ep,ev,re,r,rp)
	local tg=Duel.GetTargetCards(e)
	if #tg>0 then
		Duel.SendtoDeck(tg,nil,SEQ_DECKSHUFFLE,REASON_EFFECT)
	end
end
function s.eqfilter(c)
	return c:IsFaceup() and c:IsSummonLocation(LOCATION_EXTRA)
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(tp) and s.eqfilter(chkc) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingTarget(s.eqfilter,tp,LOCATION_MZONE,0,1,nil) end
	local c=e:GetHandler()
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	Duel.SelectTarget(tp,s.eqfilter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,c,1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_LEAVE_GRAVE,c,1,0,0)
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()
	if not c:IsRelateToEffect(e) then return end
	local tc=Duel.GetFirstTarget()
	if tc:IsFaceup() and tc:IsRelateToEffect(e) and Duel.Equip(tp,c,tc,true) then
		--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(function(e,c) return e:GetOwner()==c end)
		c:RegisterEffect(e1)
	end
end
function s.drcon(e,tp,eg,ep,ev,re,r,rp)
	local ec=e:GetHandler():GetEquipTarget()
	return ec and ec:IsRelateToBattle()
end
function s.drtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanDraw(tp,1) end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(1)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,1)
end
function s.drop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Draw(p,d,REASON_EFFECT)
end