a simple slideshow driven by iFSM:
- it goes right or left with the buttons
- it starts automatically after 5 seconds of no user interaction with the slideshow
- the slides change after 3secs
- it stops each time we click on the right/left buttons
- it stops when the mouse is over the slideshow
- it restarts when the mouse leaves after 5secs
- at the end of the slideshow, it goes back to the beginning
- at the beginning of the slideshow, going left moves the slideshow to the end
