Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
During your Standby Phase: You can pay 500 Life Points; add this card from your Graveyard to your hand. You must have no cards in your hand to activate and to resolve this effect.
--リターン・ゾンビ
--Return Zombie
local s,id=GetID()
function s.initial_effect(c)
	--to hand
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_TRIGGER_O+EFFECT_TYPE_FIELD)
	e1:SetCategory(CATEGORY_TOHAND)
	e1:SetCode(EVENT_PHASE|PHASE_STANDBY)
	e1:SetRange(LOCATION_GRAVE)
	e1:SetCountLimit(1)
	e1:SetCondition(s.condition)
	e1:SetCost(Cost.PayLP(500))
	e1:SetTarget(s.target)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsTurnPlayer(tp) and Duel.GetFieldGroupCount(tp,LOCATION_HAND,0)==0
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsAbleToHand() end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,e:GetHandler(),1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	if e:GetHandler():IsRelateToEffect(e) then
		Duel.SendtoHand(e:GetHandler(),nil,REASON_EFFECT)
	end
end