hi, does anyone know how to ad led indicator to the wall switch?
I want led to lite in the dark, so led lite when switch is off and led is off when wall switch is on.

I know how to ad led directly to 240v when light is ON led is ON but i have no idea how to make led ON when wall light switch is OFF.

Would appreciate if someone can help with circuit.

 

If it were me I would forget the LED and just wire a neon (with its usual series resistor) directly between the live and switched-live terminals.

 

You could try...
https://www.jaycar.com.au/240-volt-bezel-red/p/SL2630
https://www.jaycar.com.au/red-240v-chrome-bezel/p/SL2632
Just remember that with this across the switch there will be some current through the load even with the switch off and it will be enough to give a severe belt, if not still be fatal if you get across it.
It is a better idea to use a DPST light switch and wire the cold end of the Neon to the neutral, not just across the switch to use the load lamp as the return path.

But technically, you must get an electrician to add this to your house wiring. And if you are not sure of what you are doing, DONT!

There are a range of ready made. This is just one example...

 

I can buy wall switches which have a neon bulb in the little switch handle or as a separate display at Home Depot or Lowes.