int LEDV = 8;
int LEDG = 12;
int LEDR = 5;
int buzzerPin03 = 4;

void setup() {
  pinMode (LEDV, OUTPUT);
  pinMode (LEDG, OUTPUT);
  pinMode (LEDR, OUTPUT);
  pinMode (buzzerPin03, OUTPUT);
}

void loop() {
  digitalWrite (LEDV, HIGH);
  tone (buzzerPin03, 2000, 300);
  delay (2000);
  digitalWrite(LEDV, LOW);
  noTone(buzzerPin03);
  digitalWrite (LEDG, HIGH);
  tone (buzzerPin03, 1500, 300);
  delay (2000);
  digitalWrite(LEDG, LOW);
  noTone(buzzerPin03);
  digitalWrite (LEDR, HIGH);
  tone (buzzerPin03, 1000, 300);
  delay (2000);
  digitalWrite(LEDR, LOW);
  noTone(buzzerPin03);

}