How do I make the animation follow the target

I want to make the animation follow the angle's target so when I shot toward a higher spot I can see my character aiming up there. Right now I can shoot any where but my animation just "aim" to the right and left. I have no clue how to do that. Any help?

Get the X and Y position of the target and shooter, then use some basic trigonometry to work out the desired angle.