How do I use sprites?

Blitz3D Forums/Blitz3D Beginners Area/How do I use sprites?

I'm having a terrible time learning about sprites.
I want to create a sprite for the flash at the end of my gun when it fires, but I don't know what to do.
I'm not sure how to make it so that the flash shows and the background does not (I'm guessing MaskImage but I'm not sure how to use that either).
If some one could explain how to set up a sprite like that it would help a lot.
PS: I use Correl Photo Paint to create my textures.