void setup() {
  // put your setup code here, to run once:
pinMode (3, OUTPUT);
pinMode (2, OUTPUT);
pinMode (1, OUTPUT);
pinMode (4, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  tone(4,777);
digitalWrite(3, HIGH);
delay(3000);
noTone(4);
digitalWrite(3, LOW);
delay(500);
digitalWrite(2, HIGH);
delay(1000);
digitalWrite(2, LOW);
delay(500);
digitalWrite(1, HIGH);
delay(3000);
digitalWrite(1, LOW);
delay(500);
}