Proposal drawing and model, in collaboration with Shelly Cook Contreras.
1990
Model: Steel, plexiglas, wood.
Drawing: Ink on vellum.
![Scale model.](https://www.judithblankman.com/wp-content/uploads/2023/07/tread-wheel-turnstile-1990-model-angle.jpg)
Isometric, elevation and schematic drawing of an installation/performance for the Kala Institute in Berkeley.
Two tread wheels turn on opposite sides of a central axle, activating a turnstile consisting of four mirrored revolving doors. Performers operate the mechanism interactively. The revolving mirrors redistribute light reflected from the four corners of the room