#define led 13
#define buzzer 8
void setup()
{
  pinMode(led, OUTPUT);
  pinMode(buzzer,OUTPUT);
  
}
void loop()
{
  tone(8, 500, 500);
  digitalWrite(led, HIGH);
  digitalWrite(buzzer,HIGH);
  delay(500);
  digitalWrite(led, LOW);
  digitalWrite(buzzer, LOW);
  delay(500);
}