/************************************************** 
* LED SEQUENCE PROGRAM USING ESP32 * 
* SUBMITTED BY: PENTUAN, ALVIN C. * 
* SUBMITTED TO: PROF. MICHAEL T. SAMONTE * 
* *************************************************/

#define LED1 18
#define LED2 19
#define LED3 21

void setup() {
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
}

void loop() {
  digitalWrite(LED1, HIGH);
  delay(500);
  digitalWrite(LED1, LOW);

  digitalWrite(LED2, HIGH);
  delay(500);
  digitalWrite(LED2, LOW);

  digitalWrite(LED3, HIGH);
  delay(500);
  digitalWrite(LED3, LOW);

  // Alternate pattern: LED1 and LED2 on together, then LED3 alone
  digitalWrite(LED1, HIGH);
  digitalWrite(LED2, HIGH);
  delay(500);
  digitalWrite(LED1, LOW);
  digitalWrite(LED2, LOW);
  delay(500);

  // Reverse pattern: LED3 and LED2 on together, then LED1 alone
  digitalWrite(LED3, HIGH);
  digitalWrite(LED2, HIGH);
  delay(500);
  digitalWrite(LED3, LOW);
  digitalWrite(LED2, LOW);
  delay(500);
}