When use fullscreen, the fullscreen background change automatically.
Can I change the duration of each play?
I want to make the fullscreen change more shortly or quickly.
(I already choose option of 'only one clip')

@Jplus. Click on the cogwheel in the iStripper title bar and ensure that "advanced settings" is enabled. Scroll down to the Full Screen section and use the sliders there to change the shows duration.

Also, if you start the fullscreen mode by clicking on the button next to "Buy Credits" of from the pop-up menu you get when clicking on the iStripper icon near the right hand side of the Windows task bar (I have temporalily forgoten what that area is called, I must be getting old) then you can change to a randomly selected scene by right clicking with the mouse while a scene is running. You can use this to flick through the scenes and backgrounds until you find one that you like.