int n = 0 ;
int LV = 4;
int LR = 22;
void setup() {
 pinMode(LV, OUTPUT);
 pinMode(LR, OUTPUT); 
}
void loop() {
  for (n=0; n<13; n++){
    if (n<8){
    digitalWrite(LV, HIGH);
    delay(500);
    digitalWrite(LV, LOW);
    delay(500);
    }
    else {
      digitalWrite(LR, HIGH);
      delay(500);
      digitalWrite(LR, LOW);
      delay(500);
    }
    Serial.println(n);
  }
}