const int ledPin = 2; 
void setup() 
{
 pinMode(ledPin, OUTPUT); 
 Serial.begin(115200);
}

void loop() 
{
  for(int dutyCycle = 0; dutyCycle < 255; dutyCycle++)
  {   
    analogWrite(ledPin, dutyCycle);
    Serial.println("Increment");
    //delay(100);
  }
  for(int dutyCycle = 255; dutyCycle > 0; dutyCycle--)
  { 
    analogWrite(ledPin, dutyCycle);
     Serial.println("Decrement");
    //delay(100);
  }
}