int RGB_R = 12;
int RGB_G = 11;
int RGB_B = 10;

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);

  pinMode(RGB_R, OUTPUT);
  pinMode(RGB_G, OUTPUT);
  pinMode(RGB_B, OUTPUT);
}

void setRgbState(bool R, bool G, bool B){
  digitalWrite(RGB_R, R);
  digitalWrite(RGB_G, G);
  digitalWrite(RGB_B, B);
}

void loop() {

  //setRgbState(HIGH,LOW,HIGH)

  delay(500);

  // Zelená
  digitalWrite(RGB_R, LOW);
  digitalWrite(RGB_G, HIGH);
  digitalWrite(RGB_B, LOW);

  delay(500);

  // Modrá
  digitalWrite(RGB_R, LOW);
  digitalWrite(RGB_G, LOW);
  digitalWrite(RGB_B, HIGH);

  delay(500);

  digitalWrite(LED_BUILTIN, HIGH);
  delay(500);
  digitalWrite(LED_BUILTIN, LOW);
  delay(500);
}