$image = imagecreatetruecolor(200, 50);
    $background_color = imagecolorallocate($image, 255, 255, 255);
    imagefilledrectangle($image,0,0,200,50,$background_color);
    $line_color = imagecolorallocate($image, 211,211,211);
    for($i=0;$i<40;$i++) {
        imageline($image,0,rand()%50,200,rand()%50,$line_color);
    }

    imagepng($image, "image.png");