Getting start with Arduino. https://techzeero.com/arduino-tutorials/getting-start-with-arduino/

Light Blink using Arduino.ino

/*
   Getting Start With Arduino
   For more details, visit: https://techzeero.com/arduino-tutorials/getting-start-with-arduino/ 
*/

void setup() 
{
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
}

void loop() 
{
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

Dear reader to read full tutorial on how to getting start with Arduino visit on:- https://techzeero.com/arduino-tutorials/getting-start-with-arduino/

All Arduino Tutorials - https://techzeero.com/arduino-tutorials/