Put the sprite into the backpack, then place in your project. You change the broadcast if you want, but there needs to be a broadcast of some sort to trigger it (you could always supplement a variable for the broadcast). Finally, change the fading speed to the number of your choosing (has to be > or equal to 100). The higher the number, the slower the fade effect is!
Terminator68 here! Just put this in your project when you want your project to fade out in the end, or wherever. Enjoy!