How Can I Use Flash/fade As Transitions?

I want to use flashing / fading as transitions between menus, game overs, stores...
Something like the one used in Ninja Dive by Aaro Arts (Nice game by the way)

 

To flash set values to game over effect in character settings.

 

But how can I do that in the menus?

 

Add a white image that cover the entire screen, in all the UIs.
Put it in front of all the components.
Set its opacity to 0.

In the Open & Close fields of the Event Animation UI editor, just make an animation that changes the opacity of the white image, and you got your flash effect transition.

 

Oh right! I totally forgot about the opacity option
Thanks man!