int pinR = 13;
int pinG = 14;
int pinB = 27;

void setup() {
  pinMode(pinR, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinB, OUTPUT);
}

void loop() {
  gerarCor(255, 0, 0);
  delay(1000);
  gerarCor(0, 255, 0);
  delay(1000);
  gerarCor(0, 0, 255);
  delay(1000);
}

void gerarCor(int R, int G, int B ) {
  analogWrite(pinR, R);
  analogWrite(pinB, G);
  analogWrite(pinG, B);
}