#define led 3
#define ledd 1
#define leddd 2
#define buzzer 4

void setup(){
  pinMode(led, OUTPUT);
  pinMode(ledd, OUTPUT);
  pinMode(leddd, OUTPUT);
  pinMode(buzzer, OUTPUT);
 
}
void loop(){
  digitalWrite(led, HIGH);
  tone(buzzer, 1000);
  delay(1000);
  digitalWrite(led, LOW);
  noTone(buzzer);
  delay(1000);
  digitalWrite(ledd, HIGH);
  tone(buzzer, 1000);
  delay(1000);
  digitalWrite(ledd, LOW);
  noTone(buzzer);
  delay(1000);  
  digitalWrite(leddd, HIGH);
  tone(buzzer, 1000);
  delay(1000);
  digitalWrite(leddd, LOW);
  noTone(buzzer);
  delay(1000);

}