Make Enemies Show "Damaged" Sprite When Hurt

[LanceNekomimi 0]

Hello, I've been looking for a script or a tutorial on how to do this without a script to no prevail.  All I want is what's in the title: For the enemies to flash for about 1 second with a damaged sprite whenever taking a hit.  I don't want it to show if they are attacked but the attack misses.

 

I've been trying to work it out with variables in the troops screen but it hasn't been successful so far.  Any tips/scripts I may not know about would be greatly appreciated.