He put his head down to walk faster but was distracted by a bright sign on the side of a building as he went past. It was spray-on screen graffiti, a large blotch of screen paint thrown against a wall that could receive a signal from a phantom server and display pre-programmed images until a maintenance crew could dissolve it away. The screen looked new, probably painted last night. The image was a familiar one, a picture of the earth with the right half a lush garden, the other half on fire. It represented the duality of the world, half living in prosperity, the other half in chaos. Could have been done by any number of protest groups, like the refugee advocates, the off-grid types like XBrain Rebellion, trying to rid the world of destructive tech, or just plain old political groups pushing an agenda. This graffiti had been adopted by anyone dissatisfied with the current state of the world. Joe shook his head, feeling momentarily grateful that he was living in the green half, and he kept walking.