This is an example of an open source program called cycler that you can customize to run a program inside a simulator that shows what your program would look like when running on desktop and mobile hardware such as Kindle Fire tablets, Apple IOS devices, etc. You can set the time per device (currently 0.8 seconds), and after it runs through the portrait orientation, it switches to landscape. The only "gotcha" in this product is that you have to write in the Beads language.