Disclaimer: This eye blink mechanism WILL require a lot of tinkering. I have not had time to create step by step directions for its assembly. But hope to get around to making some soon. The Mechanism is designed to work with two black 25mm spheres.

I have included a large pully in one of the stl files, but recommend fabricating one out of Delrin, if you intend on tapping the pulley with threads for set screws.

Spheres, Plastic tubing, braided cable, set screws, spring and rod are available at McMaster-Carr.com. I intend on adding links to these parts at a later date.