int ledPin = 5;  
int ledPin2 = 3;

void setup() {
  pinMode(ledPin, OUTPUT);   
  pinMode(ledPin2, OUTPUT);   
}

void loop() {
  
  for (int fadeValue = 0 ; fadeValue <= 255; fadeValue = fadeValue+2) 
  {
    analogWrite(ledPin, fadeValue);
    delay(30);
  }

  
  for (int fadeValue = 255 ; fadeValue >= 0; fadeValue = fadeValue-5) 
  {
    analogWrite(ledPin, fadeValue);
    delay(30);
  }

  
  for (int fadeValue = 0 ; fadeValue <= 255; fadeValue = fadeValue+5) 
  {
    analogWrite(ledPin2, fadeValue);
    delay(30);
  }

  
  for (int fadeValue = 255 ; fadeValue >= 0; fadeValue = fadeValue-5)
   {
    analogWrite(ledPin2, fadeValue);
    delay(30);
  }

  
}