int light = 2;
int buzzer = 4;
void setup() {
  // put your setup code here, to run once:
 pinMode(buzzer, OUTPUT);
 pinMode(light, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
 tone(buzzer,100, 1000);
 digitalWrite(light, HIGH);
 delay(1000);
 digitalWrite(light, LOW);
 delay(1000);

}