When Gets To The End Of The Cycle Of Images It Reads The Last Image As The Last One To Reach The Left Hand Side Which Is Obviously Quite Unattractive?

I'm busy creating a website and I've implemented a gallery of sorts using this script below to make it move the images, however when it gets to the end of the cycle of images it reads the last image as the last one to reach the left hand side which is obviously quite unattractive. So all I would like to know is if there is someone who can alter this code to make it so the last image is read on the right of the block thus resulting in no blank blocks. You can view it in action at http://mcphotography.co.za/corporate.html.

Code:
var Spry;
if (!Spry) Spry = {};

[code]....