void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(14, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(27, OUTPUT);
  pinMode(15, OUTPUT);
  pinMode(23, INPUT);
}

void loop() {
  digitalWrite(14,HIGH);
  digitalWrite(21, HIGH);
  delay(1000);// put your main code here, to run repeatedly:
  digitalWrite(14,LOW);
  digitalWrite(21, LOW);
  delay(1000);
  digitalWrite(12, HIGH);

  digitalWrite(12, LOW);
   delay(1000);
  digitalWrite(27,HIGH);
  digitalWrite(15, HIGH);// put your main code here, to run repeatedly:
  delay(1000);
  digitalWrite(27,LOW);
  digitalWrite(15, LOW);
  delay(1000);// this speeds up the simulation
}