Old TV Grey Signal

for (unsigned int x = 0; x < framebuffer.width; x++)
    {
        for (unsigned int y = 0; y < framebuffer.height; y++)
        {
            int greyNoise = randomValue()*1000; // Random grey tone, multiplying by bigger numbers, creates more white tones.
            framebuffer.setPixel(x, y, Color(greyNoise%256, greyNoise%256, greyNoise%256)); // Grey colors have the same value for RGB.
        }
    }