I created a script that logs on your account and follows back everyone that recently followed you. At over 3k followers and only 500 followings, I felt weird about that ratio - so I decided to create a bot.
Code is available on Github, see .travis.yml for usage and dependencies.
You can fork it, create travis account if you do not have any.
Read further on how to:
- automate the script: https://docs.travis-ci.com/user/cron-jobs/
- add environment variables: https://docs.travis-ci.com/user/environment-variables/