Thanks for your compliments.
no, there is unfortunately no program which generates the pattern automatically ;)
i took a class with Chyntia England. I learned the basics there, with paper, pencil and ruler...and lot of patience.
Back at home i wish to do something bigger, and also unfortunately i had not enough paper and no ruler long enough, so I started thinking. I´m a technical draftsman and tryed to made the line with some CAD Programms... without good results. By an accident I found out that Microsoft Excel is a good way to create the lines and print out at the end in any size you prefer and suitable.