void setup() {
  pinMode(2, OUTPUT);
  pinMode(8, OUTPUT);
  Serial.begin(9600);
}

void loop() {

  Serial.println("Blink");

  for (int i = 0; i < 5; ++i)
  {
    digitalWrite(2, HIGH);
    delay(250);
    digitalWrite(2, LOW);
    delay(250);
  }

  delay(500);

  Serial.println("PWM");

  for (int i = 0; i < 5; ++i)
  {
    for (int j = 0; j < 255; ++j)
    {
      analogWrite(3, j);
      delay(1);
    }

    for (int j = 255; j > 0; --j)
    {
      analogWrite(3, j);
      delay(1);
    }
  }

  delay(500);

  Serial.println("Tone");

  tone(8, 100, 825);
  delay(825);

  tone(8, 150, 425);
  delay(425);

  tone(8, 200, 250);
  delay(250);

  delay(500);
}