Well, I was actually able to do it, but just a simple fade in/out effect. What you need to do is simple make a black tilebackground covering the whole layout, then set its opacity to 0 by default, when give it a private variable which is also equal to 0.
Now when you need to use a fade in transition, just make an event like this (lets say the private variable of black is called opa, and the black tiled bg is called black:
If black's opacity < 100
--> Every 1000 millisecond
--> opa = opa + 1
--> black's opacity = opa
Yeah, something like that. Just do the opposite for the fade out thing.