LED RGB

 const int redPin = 9;    

const int greenPin = 10;

const int bluePin = 11;  

void setup() {

  pinMode(redPin, OUTPUT);

  pinMode(greenPin, OUTPUT);

  pinMode(bluePin, OUTPUT);

}

void loop() {

  // Encender solo el color rojo

  analogWrite(redPin, 255);  

  analogWrite(greenPin, 0);  

  analogWrite(bluePin, 0);  

  delay(1000);              

  // Encender solo el color verde

  analogWrite(redPin, 0);    

  analogWrite(greenPin, 255);

  analogWrite(bluePin, 0);  

  delay(1000);

  // Encender solo el color azul

  analogWrite(redPin, 0);    

  analogWrite(greenPin, 0);  

  analogWrite(bluePin, 255);

  delay(1000);

  // Encender amarillo (rojo + verde)

  analogWrite(redPin, 255);  

  analogWrite(greenPin, 255);

  analogWrite(bluePin, 0);  

  delay(1000);

  // Encender cian (verde + azul)

  analogWrite(redPin, 0);    

  analogWrite(greenPin, 255);

  analogWrite(bluePin, 255);

  delay(1000);

  // Encender magenta (rojo + azul)

  analogWrite(redPin, 255);  

  analogWrite(greenPin, 0);  

  analogWrite(bluePin, 255);

  delay(1000);

  // Encender blanco (rojo + verde + azul)

  analogWrite(redPin, 255);  

  analogWrite(greenPin, 255);

  analogWrite(bluePin, 255);

  delay(1000);

  // Apagar el LED

  analogWrite(redPin, 0);    

  analogWrite(greenPin, 0);

  analogWrite(bluePin, 0);  

  delay(1000);

}