Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Send 1 Level 4 or lower Normal Monster from your Deck to the GY, and if you do, add 1 monster with the same name from your Deck to your hand. You can only activate 1 "Painful Decision" per turn.
--苦渋の決断
--Painful Decision
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_TOGRAVE)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.tgfilter(c,tp)
	return c:IsLevelBelow(4) and c:IsType(TYPE_NORMAL) and c:IsAbleToGrave()
		and Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,c,c:GetCode())
end
function s.thfilter(c,code)
	return c:IsCode(code) and c:IsAbleToHand()
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,tp) end
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,nil,1,tp,LOCATION_DECK)
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.activate(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,tp)
	local tc=g:GetFirst()
	if tc and Duel.SendtoGrave(tc,REASON_EFFECT)~=0 and tc:IsLocation(LOCATION_GRAVE) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local sg=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil,tc:GetCode())
		if #sg>0 then
			Duel.SendtoHand(sg,nil,REASON_EFFECT)
			Duel.ConfirmCards(1-tp,sg)
		end
	end
end