int red = 21;
int green = 22;
int blue = 23;
int angka = 3;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(red, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);

  while (angka >= 0, angka++){
    RGB(1, 0, 0);
    delay(300);

    RGB(1, 1, 0);
    delay(300);

    RGB(0, 1, 0);
    delay(300);

    RGB(0, 1, 1);
    delay(300);

    RGB(0, 0, 1);
    delay(300);

    RGB(1, 0, 1);
    delay(300);

    RGB(1, 1, 1);
    delay(300);
  }

}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}

void RGB(bool pinred, bool pingreen, bool pinblue){
  digitalWrite(blue, pinblue);
  digitalWrite(green, pinblue);
  digitalWrite(red, pinred);
}