Rusty

Lost in dark labytinth left by humans a long time ago prior to their exodus, Rusty, a little robot with a lamp in his head, can see only a small part of space around him when moving, but if he stops for looking around and deciding which turn he should take, then he will eventually become… well, rusty. And the more rust he has the less power is left in him to take another step, so when all covered in it, he would… How did humans call it? Die? And he definitely wants to be alive, like every human ...