#include <Arduino.h>

#define RED_LED 13   // LED merah
#define GREEN_LED_R 21  // LED hijau - merah
#define GREEN_LED_G 19  // LED hijau - hijau
#define GREEN_LED_B 18  // LED hijau - biru
#define BLUE_LED 14  // LED biru

void setup() {
  Serial.begin(115200);
  pinMode(RED_LED, OUTPUT);
  pinMode(GREEN_LED_R, OUTPUT);
  pinMode(GREEN_LED_G, OUTPUT);
  pinMode(GREEN_LED_B, OUTPUT);
  pinMode(BLUE_LED, OUTPUT);
  Serial.println("Contoh Program LED SOS");
}

void loop() {
  // 3 dits (3 titik atau huruf S)
  // for (int x = 0; x < 3; x++) {
  //   digitalWrite(RED_LED, HIGH);
  //   delay(150);
  //   digitalWrite(RED_LED, LOW);
  //   delay(100);
  // }
  // delay(100);

  for (int x = 0; x < 3; x++) {
    // blink green LED in RGB format
    analogWrite(GREEN_LED_R, 0); // set red color to maximum
    analogWrite(GREEN_LED_G, 255);   // set green color to minimum
    analogWrite(GREEN_LED_B, 0);   // set blue color to minimum
    delay(400);
    analogWrite(GREEN_LED_R, 0);   // set red color to minimum
    analogWrite(GREEN_LED_G, 0);   // set green color to minimum
    analogWrite(GREEN_LED_B, 0);   // set blue color to minimum
    delay(100);
  }

  // 100ms delay to cause slight gap between letters
  delay(100);

  for (int x = 0; x < 3; x++) {
    digitalWrite(BLUE_LED, HIGH);
    delay(150);
    digitalWrite(BLUE_LED, LOW);
    delay(100);
  }

  delay(100);

  for (int x = 0; x < 3; x++) {
    digitalWrite(RED_LED, HIGH);
    delay(150);
    digitalWrite(RED_LED, LOW);
    delay(100);
  }

  // wait 5 seconds before repeating the SOS signal
  delay(1000);
}