NEED SOME HELP WITH SCRIPTING [VX]

Hello everybody, I have an idea which I think will help some designers out there.
I seem not to have luck in finding a script like this on the net, so here goes :

Did you ever play God of War?
I particularly like the mini-games which offer the possibility of killing an enemy in a quick way. I wanted to make something like this, but it didn't work for me.
I used the SSS Script Bullseye to make a conditional branch in which if the player hit the bullseye, he would kill the monster (probably in a gory way). If not, he would get a counter-attack.
But, no matter what I do, nothing seems to happen.

Does anyone know a script that does this, or knows how to make this happen?