Simple PHP Bar System

<?php
    header("Content-type: image/png");

    $cBackground = array('red' => 111, 'blue' => 182, 'green' => 255);
    $cFrame      = array('red' => 0, 'blue' => 0, 'green' => 0);
    $cBar        = array('red' => 0, 'blue' => 126, 'green' => 255);
    $cText       = array('red' => 255, 'blue' => 255, 'green' => 255);

    $iWidth  = 202;
    $iHeight = 18;

    $oImage       = @ImageCreate($iWidth, $iHeight) or die("LOL");

    $oBackground  = ImageColorAllocate($oImage, $cBackground['red'], $cBackground['blue'], $cBackground['green']);
    $oFrame       = ImageColorAllocate($oImage, $cFrame['red'], $cFrame['blue'], $cFrame['green']);
    $oBar         = ImageColorAllocate($oImage, $cBar['red'], $cBar['blue'], $cBar['green']);
    $oText        = ImageColorAllocate($oImage, $cText['red'], $cText['blue'], $cText['green']);

    ImageRectangle($oImage, 0, 0, $iWidth - 1, $iHeight - 1, $oFrame);

    if(isset($_GET['percent']))
    {
        if(($_GET['percent'] >= 0) AND ($_GET['percent'] <= 100))
        {
            $iPercent = intval($_GET['percent']);
        }
        else
        {
            $iPercent = 0;
        }
    }
    else
    {
        $iPercent = 0;
    }

    if($iPercent != 0)
    {
        for($i = 1; $i < ($iPercent * 2); $i += 2)
        {
            ImageLine($oImage, (0 + $i), 1, (0 + $i), 16, $oBar);
            ImageLine($oImage, (1 + $i), 1, (1 + $i), 16, $oBar);
        }
    }

    $sText = $iPercent . '%';

    ImageTTFText($oImage, 10, 0, 90, 13, $oText, "verdana.ttf", $sText);

    ImagePng($oImage);
?>