Hello, I am creating a UMS map and I want to get 15GAS when I kill any enemy unit. I use { ——player 1 kills at least 1- modify resources for 1: add 15 gas——}, but the trigger will only succeed once, and nothing will happen when I kill the next unit. I tried to use the preserve trigger repeatedly but failed. Does anyone know what to do? Thank you.
Also, I used translation software. Please forgive my poor grammar

This article goes into detail for the several kills to cash systems and their advantages and disadvantages.

Thank you, this really helped me a lot.