LSystem LogSpiral;

  · logarithmic spiral as found in several
  · seashells and mammals horns

  define R = 1.021;

  angle = 7.5;

  useralphabet = {A};
  axiom = -(135)A(1,0);
  lifespan = 165;

  developmentrules = {
    p1 : A(s,phi) : true -> -F(s)A(s*R,phi+1);
  };