while ($i < 5) {
  $date=mysql_result($result,$i,"date");
  $score=mysql_result($result,$i,"rating_score");
  echo $score;
  $chartData[0][] = $score;
  $chartData[1][] = rand(250,4000);
  $chartData[2][] = rand(250,4000);
  $categories[$i] = 'Label-' . $i;
  $i++;
}

$chartData[0][] = $score;
$chartData[1][] = rand(250,4000);
$chartData[2][] = rand(250,4000);

$chartData[0][] = $score;
$chartData[0][] = rand(250,4000);
$chartData[0][] = rand(250,4000);