void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(12, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(14, OUTPUT);
  pinMode(15, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(18, OUTPUT);
}

void loop() {
  digitalWrite(12, HIGH);
  digitalWrite(2, LOW);
  digitalWrite(14, LOW);
  digitalWrite(15, LOW);
  digitalWrite(5, LOW);
  digitalWrite(18, HIGH);
  delay(6000);
  digitalWrite(12, LOW);
  digitalWrite(2, LOW);
  digitalWrite(14, HIGH);
  digitalWrite(15, LOW);
  digitalWrite(5, HIGH);
  digitalWrite(18, LOW);
  delay(3000);
  digitalWrite(12, LOW);
  digitalWrite(2, HIGH);
  digitalWrite(14, LOW); 
  digitalWrite(15,HIGH);
  digitalWrite(5, LOW);
  digitalWrite(18, LOW);
  delay(6000);// this speeds up the simulation
}