int led1 =5;
int led2 = 7;
int buz=3;
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);// #for off or no sound
delay(500);//milisecond
}