Using Oxwall Repository.
1. Create an account at:
https://bitbucket.org/account/simple-signup/
2. Sign in and proceed to Oxwall's public repository located at :
https://bitbucket.org/oxwall/public
3. Fork the repository
4. Clone forked repository to your local machine
5. Do the changes.
6. Push changes ( commit) to your fork
6. Create Pull Request.
7. Wait.