Add some Zen by GitHub to your WordPress website. The guys from GitHub provide a great API at https://api.github.com/zen with various geeky messages. The plugin is fetching the messages for use in a widget or shortcode.
The API has a limit of 60 requests/min for anonymous users. A standard timeout of 20min is recommended for a normal load. Data is stored in a transient for internal access over the timeout period before updating it from the API.
Use the DX GitHub Zen Widget and set a title and timeout for your messages.
Use the [dx_github_zen] shortcode in your posts/pages to display the messages there.
Upload the DX GitHub Zen plugin to your blog and activate it.
Use a widget or a shortcode as described above.