Islands and lakes

For an explanation see L-systems.

var level = 2; var axiom = 'F-F-F-F'; var rules = { 'F' : 'F-f+FF-F-FF-Ff-FF+f-FF+F+FF+Ff+FFF', 'f' : 'ffffff', '+' : '+', '-' : '-' }; var symbols = { 'F':'F', 'f':'f', '+':'+', '-':'-', '[':'[', ']':']' } ; var angle = 90; var len = 20/Math.pow(2,level);

• Przemyslaw Prusinkiewicz, James Hanan: Lindenmayer Systems, Fractals, and Plants (Lecture Notes in Biomathematics). Springer-Verlag 1989, ISBN 0-387-97092-4
• http://en.wikipedia.org/wiki/L-system