https://www.latimes.com/local/lanow/la-me-ln-bird-red-zones-20180914-story.html

https://www.buzzfeednews.com/article/nicolenguyen/what-is-smart-gun-technology

A helpful video to help me understand some ideas for how to make the machine automated and different ways to make pulleys.

https://www.youtube.com/watch?v=kUHmYKWwuWs