@sayedfmurad, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advice on) your project 
See About the Installation & Troubleshooting category.
As you have two output pins, we can not determine which one you're talking about. Pin 5 or LED_BUILTIN.
@slowcoder, oP does not want to blink