int num, suma_a, suma_b, suma_act, i, veces;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32-S3!");
  pinMode(7, OUTPUT);
}

void loop() {
 /* // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
  //Encender led durante 250 mms
  digitalWrite(7, HIGH);
  delay (250);
  //Apagar led
  digitalWrite(7, LOW);
  delay (250);
  */
  Serial.print("Ingrese un número entre 2 y 9:");
  do {
    if (Serial.available()>0){
    num = Serial.read();
    num = num - '0';
    }
  }while (!(num>=2 && num<=9));
  Serial.println(num);
  suma_a=0;
  suma_b=1;
  suma_act=2;
  //Imprimimos los dos primeros asteríscos y también el parpadeo
    Serial.println('*');
  //Encender led durante 500 mms
    digitalWrite(7, HIGH);
    delay (500);
  //Apagar led
    digitalWrite(7, LOW);
    delay (1000);
  for(veces=2; veces<num; veces++){
    for(i=2; i<=suma_act; i++){
      Serial.print('*');
    //Encender led durante 500 mms
     digitalWrite(7, HIGH);
    delay (500);
    //Apagar led
    digitalWrite(7, LOW);
    delay (500);
    }
    suma_a=suma_b;
    suma_b=suma_act;
    suma_act=suma_a+suma_b;
    Serial.println();
    delay (1000);
  }
  
}