const int ledPin =  D0;  // the number of the LED pin0
const int ledPin2 =  D6;  // the number of the LED pin6
const int ledPin3 =  D7;     // the number of the LED pin7
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(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
}

void loop()
{ 
  buttonState = digitalRead(buttonPin);
  if (buttonState == HIGH) {
     
    for (int i=0; i <= 5; i++)
      {
        delay(500);
        digitalWrite(ledPin, HIGH);
        delay(500);
        digitalWrite(ledPin, LOW);
          delay(500);
        digitalWrite(ledPin2, HIGH);
        delay(500);
        digitalWrite(ledPin2, LOW);
        delay(500);
         digitalWrite(ledPin3, HIGH);
        delay(500);
        digitalWrite(ledPin3, LOW);
      }
  } else {
    
    digitalWrite(ledPin, LOW);
  }
  }