Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Pay 300 Life Points to use this card's effect. Shuffle either your or your opponent's Deck. You can only use this effect during your turn, once per turn.
--ショット・ガン・シャッフル
--Card Shuffle
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)
	--
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCountLimit(1)
	e2:SetCost(Cost.PayLP(300))
	e2:SetOperation(s.operation)
	c:RegisterEffect(e2)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	local opt=Duel.SelectOption(tp,aux.Stringid(id,1),aux.Stringid(id,2))
	if opt==0 then 
		Duel.ShuffleDeck(tp)
	else
		Duel.ShuffleDeck(1-tp)
	end
end