Eyes on the ground A Quote by Akira Kurosawa www.youtube.com When you go mountain climbing, the first thing you’re told is not to look at the peak but to keep your eyes on the ground as you climb. You just keep climbing patiently one step at a time. If you keep looking at the top, you’ll get frustrated. I think writing is similar. You need to get used to the task of writing. You must make an effort to learn to regard it not as something painful but as routine. writingexperienceskill
Wang tiles Wang tiles (Hao Wang, 1961) are a class of formal systems. They are modelled visually by square tiles with a color on each side. A set of such tiles is selected, and copies of the tiles are arranged side by side with matching colors, without rotating or reflecting them. The basic question about a set of Wang tiles is whether it can tile the plane or not, i.e., whether an entire infinite plane can be filled this way. The next question is whether this can be done in a periodic pattern. In 1966, Wang's student Robert Berger solved the problem in the negative. He proved that no algorithm for the problem can exist, by showing how to translate any Turing machine into a set of Wang tiles that tiles the plane if and only if the Turing machine does not halt. The undecidability of the halting problem then implies the undecidability of Wang's tiling problem. Wikipedia en.wikipedia.org Truchet TilesThe Tiling Patterns of Sebastien Truchet and the Topology of Structural Hierarchy mathalgorithms