Newbie has question

Hello

I am very new to WordPress and am trying to create a plugin
that will display on a website page (ex: page id 1654)
the contents of a directory of the server….
and have no idea how to do this.

I can my plugin in the admin panel and am able to activate it, but how do I get it to display on a single page?

Code:

$dir = ‘http://www.eastcoasttechwriter.ca/httpdocs/wp-content/plugins/UploadMe/images/’;

if (is_dir($dir))
{
if ($dh = opendir($dir))
{
while (($file = readdir($dh)) !== false)
{
echo “filename: $file : filetype: ” . filetype($dir . $file) . “\n”;
}
closedir($dh);
}
else
{
echo “No Files found.”;
}