int led1=9;
int led2=8;
int buz=4;
void setup() {
  // put your setup code here, to run once:
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(buz, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(led2, HIGH);
  digitalWrite(led1, LOW);
  //digitalWrite(buz, HIGH);
  tone(buz,800);
  delay(300);//,=milisecond

  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  tone(buz, 600);//tone(buz, 1000);
  //digitalWrite(buz, LOW)//tone(buz, LOW);//#for on off sound
  delay(500);
}