// Double slashes indicate this line is a comment that Processing can ignore. 
// Comments in your code make it easier to follow. 
// The first thing to do is declare all the variables we will use.
float x, y, seed=888, f=0; // Each seed value gives a different fractal.
double df=0, ddf=TWO_PI/seed; 
int i=0;

void setup(){ // 'setup' is called just once, when the program is run.
  size(200,200); // Tell Processing how big a window it should use.
}

void draw(){ // 'draw' is called every time the program draws a frame.
  // We need to reset most of the variables every frame.
  x=100;
  y=100;
  i=0;
  f=0;
  df=0;
  background(255); // This fills in the frame with a white background.
  while (i<9000){ // Repeat the next block 9000 times.
    i+=1; // This means 'add 1 to i'. We could also write out 'i=i+1'.
    f+=df;
    df+=ddf;
    x+=cos(f);
    y+=sin(f);
    point(x,y); 
  }
  ddf+=0.000000005; // Increasing this each frame causes animation to happen.
}