Magento: Get gallery Images

<?php
$obj = new Mage_Catalog_Block_Product_View_Media();
$_product = new Mage_Catalog_Model_Product();
// Load all product information of a particular product
$Products_one = Mage::getModel('catalog/product')->load($id);
// Use your Product Id instead of $id
$countt = count($Products_one->getMediaGalleryImages());
if($countt>0){
foreach ($Products_one->getMediaGalleryImages() as $_image)
{
// For the Original Image
echo "<img src=".Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA).str_replace(Mage::getBaseUrl('media'),"",$_image->url)." alt='' />";
//For gallery Image
$resizeimage = $obj->helper('catalog/image')->init($_product, 'thumbnail', $_image->getFile())->backgroundColor(242,242,243)->resize(400,300);
echo "<img src=".$resizeimage."alt='' />";
}
}