 // Go to the Project Settings (nut icon).
 char auth[] = "YourAuthToken";
 
+// Select your pin with physical button
+const int btnPin = 7;
+
 WidgetLED led1(V1);
 WidgetLED led2(V2);
+WidgetLED led3(V3);
 
 SimpleTimer timer;
 

  Serial.begin(9600); // See the connection status in Serial Monitor
  Blynk.begin(auth);

  while (Blynk.connect() == false) {
    // Wait until connected
  }

  timer.setInterval(1000L, blinkLedWidget);
  timer.setInterval(200L, fadeLedWidget);
}

void blinkLedWidget()
{
  if (led1.getValue()) {

  }
}

// V3 LED Widget represents the physical button state
boolean btnState = false;
void buttonLedWidget()
{
  // Read button
  boolean isPressed = (digitalRead(btnPin) == LOW);

  // If state has changed...
  if (isPressed != btnState) {
    if (isPressed) {
      led3.on();
    } else {
      led3.off();
    }
    btnState = isPressed;
  }
}

void loop()
{
  Blynk.run();
  timer.run();
}

