Colin is right, you’d need 1.8 CMS and player - currently there is 1.8.0-rc1 released, which is not recommended for production environment yet.
Either that, or make your application trigger changeLayout API call, which is also described in my 1.8 api introduction.
So you’d provide the layoutID, displayGroupID - each display has it’s own display group id, alternatively that can be actual display group id if that should affect whole display group that you created.
You would also specify the duration for which this layout should be displayed
After that duration ends, player will go back to regular layout.