function test() {
	var action;

	function chat(nick, msg) {
		if (nick === "bla") {
			action = msg;
		}
	}

	addEventListener("chatmsg", chat);

	while (true) {
		switch (action) {
		case "a":
			do something
			break;
		case "b":
			do something else
			break;
		}

		action = "";

		delay(200);
	}

	return true;
}