//Initializing LED Pin
int led_pin = 9;
void setup() {
  //Declaring LED pin as output
  pinMode(led_pin, OUTPUT);
}
void loop() {
  //Fading the LED
    analogWrite(led_pin, 25);
    delay(500);
    analogWrite(led_pin, 75);
    delay(1000);    
    analogWrite(led_pin, 255);
    delay(2000);
    
   }