int t = 1;

void setup(){
  size(512, 512);
  noStroke();
}

void draw(){
  for (int x = 0; x < width; x++){
    for (int y = 0; y < height; y++){
      int z = (((t<<t^(t>>8))|(t<<7))*((t<<t&(t>>12))|(t<<10))); //THE FORMULA - modify it for other graphic
      //Limit to 0-255 (unsigned short, 8 bit) dynamic range
      z = z%256;
      if (z<0){
        z=255+z;
      }
      fill(z);
      rect(x, y, 1, 1);
      t++;
    }
  }
}