Fuel

Lost in the forest, a robot was slowly running out of energy. It heard a clanking of gears and a thumping of pistons, and, intrigued, it followed the sound to a clearing. In the middle of the clearing stood a huge factory, and the aura of energy from it charged the robot. It stayed in the clearing, having all it needed to survive, but soon the factory itself began to run out of fuel. The robot exp…