pb2 din carte arduino gresita

int switchState = 0;

void setup() {
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(2, INPUT);

}

void loop() {

 switchState = digitalRead(2);

 if(switchState == LOW)
   {

    digitalWrite(3, HIGH);
    digitalWrite(4, LOW);
    digitalWrite(5, LOW);
   }

  else
  {

      digitalWrite(3, LOW);
      digitalWrite(3, LOW);
      digitalWrite(3, HIGH);
      delay(250);
      digitalWrite(3, HIGH);
      digitalWrite(3, LOW);
      delay(250);

  }
}