// John Carlo D. Martin  
// BSCPE4A

const int FirstLed = 3; 
const int SecondLed = 5; 
const int ThirdLed = 6; 

int brightness = 0;    
int fadeAmount = 5;    

void setup() {
  pinMode(FirstLed, OUTPUT);
  pinMode(SecondLed, OUTPUT);
  pinMode(ThirdLed, OUTPUT);
}

void loop() {
  analogWrite(FirstLed, brightness);
  analogWrite(SecondLed, brightness);
  analogWrite(ThirdLed, brightness);

  brightness += fadeAmount;

  if (brightness <= 0 || brightness >= 255) {
    fadeAmount = -fadeAmount;
  }

  delay(25);
}