Watch the tutorial video here: https://www.invisionapp.com/studio/learn/the-timer-trigger
Sometimes there's a need for a transition to occur without the user clicking on anything. To make this happen in the prototype, use Studio's timer trigger.
You cannot link one object with the timer trigger. The interaction must take place from one entire artboard to the next. That being said, if you need only one object to be affected by this timer, you must create a copy of the artboard and alter that object in the copy.
All you have to do to use the timer is create an interaction (from one artboard to another), and set that interaction to "timer" rather than hover or tap or anything else. You can then alter the timer length, which allows for quick or slow transitions.
It's as simple as that!
For a more detailed walkthrough, visit the above link.