Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Gains ATK equal to its Level x 300. Cannot be destroyed by battle with an opponent's monster whose original Level/Rank is lower than this card's Level. Each time a "F.A." Spell/Trap Card or effect is activated: You can increase this card's Level by 1. If this card is Level 7 or higher, it can make up to 2 attacks on monsters during each Battle Phase.
--Ｆ．Ａ．ソニックマイスター
--F.A. Sonic Meister
local s,id=GetID()
function s.initial_effect(c)
	--increase ATK
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetValue(s.atkval)
	c:RegisterEffect(e1)
	--cannot be destroyed by battle
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e2:SetValue(s.indval)
	c:RegisterEffect(e2)
	--increase level
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,0))
	e4:SetCategory(CATEGORY_LVCHANGE)
	e4:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e4:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e4:SetCode(EVENT_CHAINING)
	e4:SetRange(LOCATION_MZONE)
	e4:SetCondition(s.lvcon)
	e4:SetOperation(s.lvop)
	c:RegisterEffect(e4)
	--attack twice
	local e5=Effect.CreateEffect(c)
	e5:SetType(EFFECT_TYPE_SINGLE)
	e5:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e5:SetRange(LOCATION_MZONE)
	e5:SetCode(EFFECT_EXTRA_ATTACK_MONSTER)
	e5:SetCondition(s.excon)
	e5:SetValue(1)
	c:RegisterEffect(e5)
end
s.listed_series={SET_FA}
function s.atkval(e,c)
	return c:GetLevel()*300
end
function s.indval(e,c)
	local lv=e:GetHandler():GetLevel()
	if c:GetRank()>0 then
		return c:GetOriginalRank()<lv
	elseif c:HasLevel() then
		return c:GetOriginalLevel()<lv
	else return false end
end
function s.lvcon(e,tp,eg,ep,ev,re,r,rp)
	return re:IsSpellTrapEffect() and re:GetHandler():IsSetCard(SET_FA)
end
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsRelateToEffect(e) and c:IsFaceup() then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_LEVEL)
		e1:SetValue(1)
		e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
		e1:SetRange(LOCATION_MZONE)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE)
		c:RegisterEffect(e1)
	end
end
function s.excon(e)
	return e:GetHandler():IsLevelAbove(7)
end