Read the instructions. Click on the green flag. Enter three values, run in turbo.
The background for this project can be found in th book The Turing Omnibus - 61 Excursions in Computer Science, by A. K. Dewdney, Chapter 1, page 3 and in Computer Recreations, A. K. Dewdney, Scientific American, September 1986. I assign Wallpaper as a programming project prior to assigning students the Mandelbrot set algorithm as a programming exercise. Wallpaper is an interesting look at the circle formula and odd and even. Each set of unique inputs generates a unique pattern that is unpredictable. Even though we know the equation of a circle and how to test for even or odd, we have no way of predicting the pattern generated by the three inputs. it has to be computed to be seen. A detailed explanation of how the code is constructed can be had at www.scratch-blog.com
