First you need to have a Flickr Account (Free of charge), then upload photos the site in a "Gallery".
1. Click "Slideshow" then play the slideshow of the set
2. Click "share" from the slideshow, and then Copy the embed HTML code.
3. Back on your website, create a new content item,
4. Switch to the HTML Tab
5. Paste the HTML code you copied from Flickr.
This will be the result: