int timedelay=100;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  for(int i=4;i<=13;i++)
  pinMode(i, OUTPUT);
  Serial.println("Hello, ESP32!");
}

void loop() {
  for(int i=4;i<=5;i++){
    pat1();}
  for(int i=4;i<=5;i++){
    pat1();}
  }
  void pat1()
  {
    for(int i=4;i<=13;i++)
    {
      digitalWrite(i, HIGH);
      delay(100);
      digitalWrite(i, LOW);
    }
  }
  void pat2()
  {
    for(int i=4;i<=13;i+2)
    {
      digitalWrite(i, HIGH);
      delay(100);
      digitalWrite(i, LOW);
    }
    for(int i=13;i>=4;i=i-2)
    {
       digitalWrite(i, HIGH);
      delay(100);
      digitalWrite(i, LOW);
    }

  }


  // put your main code here, to run repeatedly:
 delay(100);// this speeds up the simulation