@chikoon The `polling_time` variable doesn't seem to be used anywhere, can we remove it?
Also a fyi, we usually use multiple `var` statements on multiple lines.

```
var poll_intervals = [2, 3, 10, 45, 60];
var polling_time; // Polling time to be set incrementally
```
One reason would be that when we make a change to a line, we only need to modify 1 line.