digital reader focus device

Need an app that functions as a virtual cover for readers of digital documents. ADD and reading disable people would use this app to keep them from losing attention as they read digital documents. This could be for Nook, android, ipad, etc. It should be "draggable" and you may want it to just function as the mouse on a mouseOver event. It should have the ability to change background and foreground cover and allow the user to drag the panels. I have done a mock up in flash and am attaching it. The need right now is promarily for portable digital readers. Please let me know what devices your version would work on.