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

}

void loop() {
  if (digitalRead(4) == 1)
  {
  digitalWrite(2, HIGH);   
  digitalWrite(3, HIGH);
  delay(300);                       
  digitalWrite(2, LOW);    
  digitalWrite(3, LOW); 
  delay(300);  
  }

}