Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When this card is Normal or Special Summoned: You can send 1 Machine monster from your Deck to the GY. Once per turn: You can shuffle 2 Level 4 EARTH Machine monsters from your GY into the Deck; draw 1 card.
--スクラップ・リサイクラー
--Scrap Recycler
local s,id=GetID()
function s.initial_effect(c)
	--send to grave
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TOGRAVE)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
	--draw
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_DRAW)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCountLimit(1)
	e3:SetCost(s.drcost)
	e3:SetTarget(s.drtg)
	e3:SetOperation(s.drop)
	c:RegisterEffect(e3)
end
function s.tgfilter(c)
	return c:IsMonster() and c:IsRace(RACE_MACHINE) and c:IsAbleToGrave()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.tgfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,tp,LOCATION_DECK)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g=Duel.SelectMatchingCard(tp,s.tgfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoGrave(g,REASON_EFFECT)
	end
end
function s.cfilter(c)
	return c:IsAttribute(ATTRIBUTE_EARTH) and c:IsRace(RACE_MACHINE) and c:GetLevel()==4 and c:IsAbleToDeckAsCost()
end
function s.drcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_GRAVE,0,2,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TODECK)
	local g=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_GRAVE,0,2,2,nil)
	Duel.SendtoDeck(g,nil,SEQ_DECKSHUFFLE,REASON_COST)
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)
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Draw(p,d,REASON_EFFECT)
end