Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When a Level 2 or lower monster you control destroys an opponent's monster by battle and sends it to the Graveyard, if you have no cards in your hand, draw 2 cards.
--弱者の意地
--Pride of the Weak
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--draw
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_DRAW)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e2:SetCode(EVENT_BATTLE_DESTROYED)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCondition(s.drcon)
	e2:SetTarget(s.drtg)
	e2:SetOperation(s.drop)
	c:RegisterEffect(e2)
end
function s.drcon(e,tp,eg,ep,ev,re,r,rp)
	local tc=eg:GetFirst()
	local bc=tc:GetBattleTarget()
	return Duel.GetFieldGroupCount(tp,LOCATION_HAND,0)==0 and #eg==1
		and tc:IsLocation(LOCATION_GRAVE) and tc:IsReason(REASON_BATTLE)
		and bc:IsRelateToBattle() and bc:IsControler(tp) and bc:IsLevelBelow(2)
end
function s.drtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(2)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,2)
end
function s.drop(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) or Duel.GetFieldGroupCount(tp,LOCATION_HAND,0)~=0 then return end
	local p,d=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER,CHAININFO_TARGET_PARAM)
	Duel.Draw(p,d,REASON_EFFECT)
end