void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(2, HIGH);
  delay(1000); // this speeds up the simulation
digitalWrite(4, HIGH);
delay(500);
digitalWrite(4, LOW);
delay(250);
  digitalWrite(2, LOW);
  delay(10000);
}