void setup() {
  pinMode(15, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(17, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(13, INPUT_PULLUP);
  pinMode(27, INPUT_PULLUP);
}

void loop() {
  if(digitalRead(13)==0){
  digitalWrite(15, HIGH);delay(1000);
  digitalWrite(2, HIGH);delay(1000);
  digitalWrite(4, HIGH);delay(1000);
  digitalWrite(17, HIGH);delay(1000);
  digitalWrite(5, HIGH);delay(1000);
  digitalWrite(19, HIGH);delay(1000);
  digitalWrite(21, HIGH);delay(1000);

  digitalWrite(15, LOW);
  digitalWrite(2, LOW);
  digitalWrite(4, LOW);
  digitalWrite(17, LOW);
  digitalWrite(5, LOW);
  digitalWrite(19, LOW);
  digitalWrite(21, LOW);
  }

  if(digitalRead(27)==0){
  digitalWrite(21, HIGH);delay(1000);
  digitalWrite(19, HIGH);delay(1000);
  digitalWrite(5, HIGH);delay(1000);
  digitalWrite(17, HIGH);delay(1000);
  digitalWrite(4, HIGH);delay(1000);
  digitalWrite(2, HIGH);delay(1000);
  digitalWrite(15, HIGH);delay(1000);
  
  digitalWrite(15, LOW);
  digitalWrite(2, LOW);
  digitalWrite(4, LOW);
  digitalWrite(17, LOW);
  digitalWrite(5, LOW);
  digitalWrite(19, LOW);
  digitalWrite(21, LOW);
  }
}