oscillating air flow valve

found a GIF of this on Reddit so i made it to see if it works, so far it works all right ill work on it a little more and try to improve it.

Made with Autodesk
source:

https://www.reddit.com/r/gifs/comments/9jmjjr/device_oscillates_airflow_direction_with_no/?utm_content=title&utm_medium=user&utm_source=reddit&utm_name=frontpage