We'll create fresh WordPress site with Easy Backstretch installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Upload your image(s), set the Fade In effect, the in between slides time duration and the div you would like to apply the backstrech.
Backstretch is a simple jQuery plugin that allows you to add a dynamically-resized, slideshow-capable background image to any element. The image will stretch to fit the element, and will automatically resize as the window/element size changes.