for (i = -2; i < 2; i++) {
      frameBuffer[(x + i)     + width * (y - 2)]     = 1;
      frameBuffer[(x - 2)     + width * (y + i + 1)] = 1;
      frameBuffer[(x + 2)     + width * (y + i)]     = 1;
      frameBuffer[(x + i + 1) + width * (y + 2)]     = 1;