Phaser loop and timer

[Gods]

I am using the phaser loop and it is really powerful I have a couple questions about how to do things before I use it.

 

this.timeKeeper = 5000;

this.starTimer.loop(this.timeKeeper, this.addStar, this);

 

How would I keep score of every time this loop gets called?

How would I increase the loop speed when the score increases? 
 

I have a demo I hope you can checkout 
http://jsbin.com/xijocikihe/1/edit?js,output

 

I have tried to put this in the update method but didn't work 

   if (this.score === 500){

      this.timeKeeper = 1000;

    }
 

 

 

[Lomaz]

http://jsbin.com/rutemazine/2/edit?js,output

That may help

[Gods]

http://jsbin.com/rutemazine/2/edit?js,output

That may help

change the variables to these

this.timeKeeper = 4000;

 

    if (this.score == 500){

      this.starTimer.loop(2000, this.addStar, this);

    }

 

 

For me even tho the loop is set to 2000 the diamond spawning is inconsistent