[joseyisleet]

most likely if you set some variables. something like this:

if (playerchats&&strequals(#c,play event)){
if (this.player==0){
this.playery+=1;
message Waiting for next player.;
} else if (this.player==1){
this.player+=1;
message 2 players are now in.
doEvent();
}
}
function doEvent(){
<your event here>;
}

Most likely something like that
or you could use setstring.