Image manipulation

[guest]

how would i make it make a new line below the one that the first text is in?

this is the script that im using

$txt = "hello";
  define("TextFONT", "3");

  function ConvertColor($hexVal){
    $ColorVal = array(3);
    for($i = 0; $i < 3; $i++)
      $ColorVal[$i] = HexDec(substr($hexVal, $i * 2, 2));
    return $ColorVal;
  }

  $width = strlen($txt) * ImageFontWidth(TextFONT);
  $offset = 2;
  $imgFRAME = ImageCreate($width, ImageFontHeight(TextFONT)+$offset);

  list($red, $green, $blue) = ConvertColor($bg);
  $bgCOLOR = ImageColorAllocate($imgFRAME, $red, $green, $blue);

  list($red, $green, $blue) = ConvertColor($fg);
  $fgCOLOR = ImageColorAllocate($imgFRAME, $red, $green, $blue);

  ImageFill($imgFRAME, 1, 1, $bgCOLOR);
  ImageString($imgFRAME, TextFONT, 1, 1, $txt, $fgCOLOR);

  header("Content-type: image/gif");
  ImageGIF($imgFRAME);
  ImageDestroy($imgFRAME);

i want it to say something else below the hello but idk how