How to update the time Interval dynamically? 
I will start the counter with 0... every iteration value will be increased to 0.1 and the periodic timer will be stopped when
the counter value reaches 20.

My requirement is I have to pass the counter values to the front end with different time intervals.

For example, If the counter value is between 0 and 5... the time interval should be 0.1 seconds. When the counter value is between 5 and 10 the time interval should be 0.005... if it is between 10 and 15 then the time interval should be 0.00005. Like this, it goes on...

I tried the below code.

```
function testLoops($loop) {
        $counter = 0;
        $loop->addPeriodicTimer(0.1, function(TimerInterface $timer)  use(&$counter, $loop) {
            $counter = $counter+0.1;

            if($counter > 5 && $counter <= 10) {
                $this->Timer(0.005);
            } else if($counter > 10 && $counter <= 15) {
                $this->Timer(0.00005);
            } else if($counter > 15 && $counter <= 20) {
                $this->Timer(0.0000005);
            }
            echo "counter: ({$counter}) \n";

            if($counter >= 20) {
                $loop->cancelTimer($timer);
            }
        });
    }
```
Could someone help me how to achieve this functionality.