game.time.events.add(Phaser.Timer.SECOND*5,this.delayOver,this);

game.time.events.loop(Phaser.Timer.SECOND,this.addMonster,this);

this.monsterTimer = game.time.events.loop(Phaser.Timer.SECOND,this.addMonster,this);
game.time.events.remove(this.monsterTimer);

Phaser.Timer.SECOND =1 second
Phaser.Timer.SECOND*5 =5 seconds
Phaser.Timer.SECOND/2= half a second or call the function twice a second
Phaser.Timer.SECOND/10 =one tenth a second

var StateMain = {
    preload: function() {},
    create: function() {
        //total time until trigger
        this.timeInSeconds = 120;
        //make a text field
        this.timeText = game.add.text(game.world.centerX, game.world.centerY, "0:00");
        //turn the text white
        this.timeText.fill = "#ffffff";
        //center the text
        this.timeText.anchor.set(0.5, 0.5);
        //set up a loop timer
        this.timer = game.time.events.loop(Phaser.Timer.SECOND, this.tick, this);
    },
    tick: function() {
        //subtract a second
        this.timeInSeconds--;
        //find how many complete minutes are left
        var minutes = Math.floor(this.timeInSeconds / 60);
        //find the number of seconds left
        //not counting the minutes
        var seconds = this.timeInSeconds - (minutes * 60);
        //make a string showing the time
        var timeString = this.addZeros(minutes) + ":" + this.addZeros(seconds);
        //display the string in the text field
        this.timeText.text = timeString;
        //check if the time is up
        if (this.timeInSeconds == 0) {
            //remove the timer from the game
            game.time.events.remove(this.timer);
            //call your game over or other code here!
            this.timeText.text="Game Over";
        }
    },
    /**
     * add leading zeros to any number less than 10
     * for example turn 1 to 01
     */
    addZeros: function(num) {
        if (num < 10) {
            num = "0" + num;
        }
        return num;
    },
    update: function() {}
}