How to create a store procedure runs automatically every time an instance of SQL Server is started

USE master
go
CREATE PROCEDURE createMyGlobalTables  AS
   CREATE TABLE ##globalTemporary1
      (-- Blah blah (insert DDL here)
   CREATE TABLE ##globalTemporary2
      (-- Blah blah (insert DDL here)
--and so on….
   CREATE TABLE ##globalTemporaryn
      (-- Blah blah (insert DDL here)

go
EXEC sp_procoption 'createMyGlobalTables', 'startup', 'true'