#define buzzer 4

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(buzzer,OUTPUT);
  }

void loop() {
  
  tone(buzzer, 500,1000);
  delay(1000);
  tone(buzzer,100,1000);
  delay(1000); // this speeds up the simulation
}