int led=2;
int buzzer=8;
int button=4;
void setup() {
 pinMode(led, OUTPUT);
 pinMode(buzzer, OUTPUT);
 pinMode(button, INPUT);

}

void loop() {
 if (digitalRead(button)==HIGH){
  digitalWrite(led, HIGH);
  digitalWrite(buzzer, HIGH);
  delay(500);
  digitalWrite(led, LOW);
  digitalWrite(buzzer, LOW);
  tone(8,523,3000);
  delay(500);
 }
}