IN node-red i want to create a flow which executes a command and if that command takes more than 15 minutes to give result it should kill itself or terminate itself

In order to make code readable and usable it is necessary to surround your code with three backticks (also known as a left quote or backquote ```)

``` 
   code goes here 
```

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See this post for more details - How to share code or flow json