void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(25, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(21, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(19, OUTPUT);
  pinMode(22, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(4, OUTPUT);
}

void loop() {
  digitalWrite(4, HIGH);
  digitalWrite(19, HIGH);
  digitalWrite(25, HIGH);// put your main code here, to run repeatedly:
  delay(2000);
  digitalWrite(4, LOW); 
  digitalWrite(19, LOW);
  digitalWrite(25, LOW);
  delay(1000);
  digitalWrite(12, HIGH);
  digitalWrite(21, HIGH);
  digitalWrite(22,HIGH);
  delay(2000);
  digitalWrite(12, LOW);
  digitalWrite(21, LOW);
  digitalWrite(22,LOW);
  delay(1000);
  digitalWrite(13, HIGH);
  digitalWrite(5, HIGH);
  digitalWrite(18, HIGH);
  delay(2000);
  digitalWrite(13, LOW);
  digitalWrite(5, LOW);
  digitalWrite(18, LOW);
  delay(1000);// this speeds up the simulation
}