How to play animation just once whenver i shoot a bullet( bullet's flash animation) ?

![alt text][1] [1]: /storage/temp/143824-gpng.png (check image), hi! i actually have two questions, the first one is : i have two flash animations that i want to play in front of the tank's turret whenever i shoot a bullet ( i have different weapons with different fire delais, machine gun, bombs..) so how can i play that flash animation to work in with the fire delai of a gun ? ( note that if i uncheck loop time , the animation stops in the last sprite + i don't know how to replay it). SECOND QUESTION : i want simply to animate my turret, when i shoot i just want it to go back a little and return, you know what i mean, only in unity, how please? give me just the idea of working and i'll do my research :) thank you !