I'm working with one of the provided explosion animations. (running 8.5) I need it to fade away/dicipate, though, rather than sit there and smolder.

I've been through everything I can think of and I just don't know how to make it fade out. [For you Flash developers, essentially I'd like to "tween" it out to an alpha of 0%, if that makes sense]

Here's what I've got:

Render Menu: Paint Effects > Get Brush > Fluid Examples > Blast.ma


I just need it to last like 20 frames and fade out. Any help?