int rojo=13;
int blue=27;
int green=14;
void setup(){
  pinMode(rojo, OUTPUT);
  pinMode(blue, OUTPUT);
  pinMode(green, OUTPUT);
}
void loop(){
  digitalWrite(blue, LOW);
  digitalWrite(green, LOW);
  digitalWrite(rojo, HIGH);
  delay(1000);
  digitalWrite(blue, LOW);
  digitalWrite(green, HIGH);
  digitalWrite(rojo, LOW);
  delay(1000);
  digitalWrite(green, LOW);
  digitalWrite(rojo, LOW);
  digitalWrite(blue, HIGH);
  delay(1000);
}