Innovative Switch

I only have one idea cause I ran it by Becky after class last time. I want to make an “Anti-Vanity Mirror” that is covered with opacity-changing glass. This is glass that has charge-sensitive particles suspended in it. When a current is passed through it, all of the particles align, and the glass becomes transparent. The idea is to overlay this material on a mirror, and use an IR distance sensor to sense when someone comes within 3 ft of the mirror. When that happens, current will flow through the glass, making the mirror visible, for 10 seconds, after which the current will stop and the mirror will become opaque again.

Step 1. Prototype
Step 2. ???
Step 3. Profit