Just incidentally, this is a slime mold robot.

The picture and story are from New Scientist.

Slime mold doesn’t like the light, so they grew some in a 6 pointed star, and detected the movement on each point. When the mold moved, the leg of the connected robot also moved. Thus the robot would scuttle away from the light.

Matt Webb, S&W, posted 2006-04-06 (talk on 2006-02-23)