void setup() {
  //pin LED
  pinMode(5,OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4, OUTPUT);
  //pin buzzer
  pinMode(10, OUTPUT);
  pinMode(11,OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13,OUTPUT);
}

void loop() {
  digitalWrite(3, HIGH);
  delay(100);
  digitalWrite(3, LOW);
  delay(100);
  tone(10,500,250);
  delay(100);

  digitalWrite(4, HIGH);
  delay(100);
  digitalWrite(4, LOW);
  delay(100);
  tone(11,1000,250);
  delay(100);

  digitalWrite(5, HIGH);
  delay(100);
  digitalWrite(5, LOW);
  delay(100);
  tone(12,1500,250);
  delay(100);

  digitalWrite(6, HIGH);
  delay(100);
  digitalWrite(6, LOW);
  delay(100);
  tone(13,2000,250);
  delay(100);
}