In 2005 we could not yet guess what would become Facebook. For this reason, I consider this remarkable 2005 Mark Zucherberg lesson to be highlighted as a simple project (with a brilliant idea not entirely original) can become a powerful tool if properly organized with an effective and fast algorithm. Facebook was created simply through php code and Mysql database. Currently, many enthusiasts or professionals are making such projects with the hope of becoming powerful as facebook. Unfortunately, however, the difficulty lies in creating something new and original. If you create a tool similar to an existing one, the probability of failure is almost 100%.