const int buzzer=7;
void setup() {
  // put your setup code here, to run once:
pinMode(buzzer, OUTPUT);
pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
pinMode(11, OUTPUT);
pinMode(10, OUTPUT);
pinMode(9, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(13, HIGH);
delay(200);
tone(buzzer,200);
delay(200);
digitalWrite(13, LOW);
delay(200);
noTone(buzzer);
delay(100);

digitalWrite(12, HIGH);
delay(200);
tone(buzzer,2000);
delay(200);
digitalWrite(12, LOW);
delay(100);
noTone(buzzer);
delay(100);

digitalWrite(11, HIGH);
delay(200);
tone(buzzer,1000);
delay(200);
digitalWrite(11, LOW);
delay(200);
noTone(buzzer);
delay(100);

digitalWrite(10, HIGH);
delay(200);
tone(buzzer,500);
delay(200);
digitalWrite(10, LOW);
delay(200);
noTone(buzzer);
delay(100);




}