Relay : green led and red led

[PeteKnight]

I fully understand the problem.
You don’t need to find examples, just read the documentation for BLYNK_CONNECTED()

Alternatively, you could read this:

Using Virtual Pins to control physical devices

I thought I’d write a guide about how to use virtual pins with app widgets such as buttons, to control physical devices such as relays, LEDs etc… Why use virtual pins anyway? I’d always recommend using virtual pins over physical pins when developing your code. There are a number of reasons, but here are what I consider to be the main ones: Virtual pins are hardware independent. This means that it’s far easier to port your code from one hardware platform to another in future (when you realise…

and read the “Synchronising the output state with the app at startup” section, but it’s just a more wordy version of what is in the official documentation:

https://docs.blynk.cc/#blynk-firmware-blynktimer-blynk_connected

Pete.