const int ledPin =  D0;      // the number of the LED pin
const int ledPin1 =  D6;
const int ledPin2 = D7; 
const int buttonPin = D1;     // the number of the pushbutton pin 
int buttonState = 0;         // variable for reading the pushbutton status
 
void setup()
{
  Serial.begin(9600);
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
    pinMode(ledPin1, OUTPUT);
    pinMode(ledPin2, OUTPUT);

}

void loop()
{ 
  buttonState = digitalRead(buttonPin);
  if (buttonState == HIGH) {
    Serial.print("Hola");
    for (int i=0; i <= 3; i++)
      {
        delay(500);
        digitalWrite(ledPin, HIGH);
        delay(500);
        digitalWrite(ledPin1, HIGH);
        delay(1000);
        digitalWrite(ledPin2, HIGH);
        delay(1000);
        digitalWrite(ledPin2, LOW);
        delay(1000);
        digitalWrite(ledPin1, LOW);
        delay(1000);
        digitalWrite(ledPin, LOW);
        
      }
  } else {
    
    digitalWrite(ledPin, LOW);
    digitalWrite(ledPin1, LOW);
    digitalWrite(ledPin2, LOW);
  }
  
}