I want to make counter, which value will be the same for all users.

I have json file, which contains data: count = 0. 

I want to run function every second which will be doing next:

1.Get value from json file

2.Update counter value

3.Change value in json file

4.Go to 1

Here is what I have now:

```
var counter = 0;
var myCounter = new flipCounter('counter', {value:counter});//initializing counter
 window.setInterval(function(){
$.getJSON('http://127.0.0.1:3000/counter.json', function(data) {1.taking the data from file
 myCounter.setValue(data.count);//2.Updating counter
 //3.here I need to change value from json file
})
}, 1000);

```

**Can someone help me with point 3( How to change json value from jQuery ) ?**