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

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

void loop() {
  int R_aleatorio = random(0, 256);
  int G_aleatorio = random(0, 256);
  int B_aleatorio = random(0, 256);
  gerarCor(R_aleatorio, G_aleatorio, B_aleatorio);
  delay(1000);
  gerarCor(R_aleatorio, G_aleatorio, B_aleatorio);
  delay(1000);
  gerarCor(R_aleatorio, G_aleatorio, B_aleatorio);
  delay(1000);
}

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