public class Island extends PixApplet
{
   public void setPix(int frame) {
      int i = 0;
      for (int y = 0; y < H ; y++)
      for (int x = 0; x < W ; x++) {
	 double X =  (x - W/2.) / (W/2.);
	 double Y = -(y - W/2.) / (W/2.);
	 double F = X*X + Y*Y - .5;

	 double freq = 3;
	 for (int j = 0 ; j < 4 ; j++) {
	    F += ImprovedNoise.noise(freq*X, freq*Y, .5) / freq;
	    freq *= 2;
         }

	 int r = g = b = 0;
	 if (F > 0)
	    r = b = 255;
	 pix[i++] = pack(r,g,b);
      }
   }
}