Motion

Hi

visit this site (http://mattstaver.lighthousewd.com/new.html). On entering the site, click any gallery. Notice how the thumbnails enter the screen from the left.

I need help in the following:

My question is, how can I build the exact thumbnail motion when they enter the screen in the above site example???

Any help would be appriciated

All I have is here, a perspex box a view of the river a tube for water.