Making a command argument the event player.

[stinkycow]

Hello, does anyone know how to make a command argument the event player? I'll give an example
 

command /counter <player=%player%>:
    permission: example
    trigger:
        set {counter.%player%} to 1

In the example the counter variable will be set for the executer and not the player in arg-1.

The goal is for arg-1 to be the event player and not the executer of the command but I haven't found a way to do it. Does anyone know how?

[_Tarna_]

Just change the %player% to %arg-1%. Also I suggest formatting the variable like {counter::%arg-1's uuid%}. It uses a list variable and uuid. The list variable makes it that you can easily loop or clear the variable. And uuid makes it so the variable won't reset when someone changes their name. 

[stinkycow]

Thank you very much!