int LEDROJO = 9;
int LEDVERDE = 10;
int LEDAZUL = 11;
void setup(){
  pinMode(LEDROJO, OUTPUT);
  pinMode(LEDVERDE, OUTPUT);
  pinMode(LEDAZUL, OUTPUT);
}
  void loop(){
  analogWrite(LEDROJO, 255);
  analogWrite(LEDVERDE, 0);
  analogWrite(LEDAZUL, 0);
  delay(2000);

  analogWrite(LEDROJO, 0);
  analogWrite(LEDVERDE, 255);
  analogWrite(LEDAZUL, 0);
  delay(2000);
  analogWrite(LEDROJO, 0);
  analogWrite(LEDVERDE, 0);
  analogWrite(LEDAZUL, 255);
  delay(2000);
}