void setup() {
  // put your setup code here, to run once:
  for (int i = 2;i <= 6;i++){
    pinMode(i, OUTPUT);

  }
}
void loop() {
  
    

  for (int i = 2;i <= 6;i++){
    digitalWrite(i, HIGH);
    delay(500);
    digitalWrite(i, LOW);

  }

 
}