How to change the color of the buttons after clicking it?

I have created a "branching scenario" in Rise using the button stack. It's working fine, except that I want the buttons to change its color once it has been clicked/visited. Currently, it does not do that. Whenever I go back to the main page with the button stack, all the buttons remain the same color even though I already clicked them.

If anyone has any suggestions, that would be really appreciated. Thanks!