Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When a face-up "Elemental HERO" monster you control leaves the field: Add 1 "Destiny HERO" monster from your Deck to your hand whose Level is less than or equal to that "Elemental HERO" monster's original Level.
--D－タイム
--D - Time
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e1:SetCode(EVENT_LEAVE_FIELD)
	e1:SetCondition(s.condition)
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
s.listed_series={SET_ELEMENTAL_HERO,SET_DESTINY_HERO}
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	local tc=eg:GetFirst()
	local lv=tc:GetLevel()
	return #eg==1 and tc:IsSetCard(SET_ELEMENTAL_HERO) and tc:IsPreviousPosition(POS_FACEUP) and tc:IsPreviousControler(tp)
end
function s.filter(c,lv)
	return c:IsLevelBelow(lv) and c:IsSetCard(SET_DESTINY_HERO) and c:IsAbleToHand()
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil,eg:GetFirst():GetLevel()) end
	e:SetLabel(eg:GetFirst():GetLevel())
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,1,nil,e:GetLabel())
	if #g~=0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end