Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If your LP is lower than your opponent's: Reveal 3 Beast monsters with 300 ATK and 100 DEF from your Deck, your opponent chooses 1 for you to add to your hand, and you shuffle the rest back into your Deck. You can only activate 1 "Emerging Emergency Rescute Rescue" per turn.
--緊急救急救命レスキュー
--Emerging Emergency Rescute Rescue
local s,id=GetID()
function s.initial_effect(c)
	--activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetLP(tp)<Duel.GetLP(1-tp)
end
function s.thfilter(c)
	return c:IsRace(RACE_BEAST) and c:GetAttack()==300 and c:GetDefense()==100 and c:IsMonster() and c:IsAbleToHand()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,3,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(s.thfilter,tp,LOCATION_DECK,0,nil)
	if #g>=3 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local sg=g:Select(tp,3,3,nil)
		Duel.ConfirmCards(1-tp,sg)
		Duel.Hint(HINT_SELECTMSG,1-tp,HINTMSG_ATOHAND)
		local tg=sg:Select(1-tp,1,1,nil)
		Duel.SendtoHand(tg,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,tg)
	end
end