size(360,180);
  for(int x = 0; x<360; x++){
    for(int y = 0; y<180; y++){
      int red = (int)(255. * cos( PI/180. * x) );
      int green = (int)(255. * sin( PI/180. * y));
      int blue = 0;
      red = abs(red) % 255;
      green = abs(green) % 255;
      blue = abs(blue) % 255;
      stroke(red, green, blue);
      rect(x, y,1,1);
    }
  }