How do I make a PNG image (or animation) show up when a character dies?

[Ace_V]

Hi! I was hoping I could implement an effect where a PNG image pops in or fades in when a character dies, then fades out two seconds later, like this:

   
(base screenshot taken from DerVVulfman's Lani's Locks)

It need not be an animation sheet, just a PNG is more than enough (see attached for examples) but really, whichever is easier to implement would be great.  

I hope someone can help me out!