The air doesn't know about zoning boundaries Work uses suggest another bugaboo: reeking smokestacks and flying ash. Of course reeking smokestacks and flying ash are harmful, but it does not follow that intensive city manufacturing (most of which produces no such nasty by-products) or other work uses must be segregated from dwellings. Indeed, the notion that reek or fumes are to be combated by zoning and land-sorting classifications at all is ridiculous. The air doesn’t know about zoning boundaries. Regulations specifically aimed at the smoke or the reek itself are to the point. Jane Jacobs, The Death and Life of Great American Cities zoningregulationsseparation
Separation and connection in all things Truchet's approach was more topological than geometric, and the qualitative aspects of pattern take priority over the metric ones. His principles provide a kind of metaphor for the hierarchy of separation and connection in all things. Cyril Stanley Smith, The Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy connectionhierarchyseparation
Right-Angle Doodling Machine A Game by Clive Thompson openprocessing.org You draw one single line. It can be as long as you like. To start the line, you put your pen down. You can make right-angle turns only, either 90 degrees or -90 degrees. You cannot back up. You must always move forward. You don’t lift your pen until you’re ready to stop. When you lift the pen, the doodle is done. drawingcodegames