The article talks about how they plan to use the optical sensor for programming and so that bursts of light could control or reprogram an entire swarm. Here is

The article talks about how they plan to use the optical sensor for programming and so that bursts of light could control or reprogram an entire swarm. Here is the key: "Unless the swarm goes all killer-bee and turns on its creators. Just in case, I’m learning how to use a flashlight to say, “ctrl-alt-del.”" Might be a good thing to keep in mind!