//Enciende la secuencia azul-amarillo-rojo en un LED RGB de ánodo común
 
#define R 27
#define G 26
#define B 25
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin as an output.
  pinMode(R, OUTPUT);
  pinMode(G, OUTPUT);
  pinMode(B, OUTPUT);
}

void loop() {
  digitalWrite(R, HIGH);  // turn the LED off (HIGH is the voltage level)
  digitalWrite(G, HIGH);  // turn the LED off (HIGH is the voltage level)
  digitalWrite(B, LOW); //turn the LED on
  delay(1000);

  digitalWrite(R, LOW);  
  digitalWrite(G, LOW);  
  digitalWrite(B, HIGH);
  delay(1000);

  digitalWrite(G, HIGH);  
  delay(1000);
}