// noprotect

/* jshint esnext:true */

​

function message(who, msg) {

    document.getElementById(who).innerHTML += msg + "<br>"

}

​

function sleep(delay) {

    return ASQ.after(delay);

}

​

function* player(table) {

    var name = table.messages[0].shift();

    var ball = table.messages[1];

​

    while (table.messages[2] !== "CLOSED") {

        // hit the ball

        ball.hits++;

        message(name,ball.hits);

​

        // delay as ball goes back to other player

        yield sleep(500);

​

        // game still going?

        if (table.messages[2] !== "CLOSED") {

            // ball's now back in other player's court

            yield table;

        }

    }

​

    message(name,"Game over!");

}

​

function* referee(table){

    var alarm = false;

​

    // referee sets an alarm timer for the game on

    // his stopwatch

    setTimeout(function(){ alarm = true; },10000);

​

    // keep the game going until the stopwatch

    // alarm sounds

    while (!alarm) {

        // let the players keep playing

        yield table;

    }

​

    // signal to players that the game is over

    table.messages[2] = "CLOSED";

​

    // what does the referee say?

    yield "Time's up!";

}

​

​

ASQ(

    ["ping","pong"], // player names

    { hits: 0 } // the ball

)

.runner(

    referee,

    player,

    player

)

.val(function(msg){

    message("referee",msg);

});

​