//This is the variable "state"
int state;
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(D0, OUTPUT);
  pinMode(D1, INPUT);
  
}

// the loop function runs over and over again forever
void loop() {
 /* This is to get the value of the button in (D1) 
  in the state variable and read it's signal */
 state=digitalRead(D1);

 //This condition allows to tell the state of the LED
 if (state == HIGH) {
    digitalWrite(D0, HIGH);
    // This is to receive the message of the "state" on the screen
    Serial.println("This LED is On");
  } else {
    digitalWrite(D0, LOW);
    // This is to receive the message of the "state" on the screen
    Serial.println("This LED is Off");
  }
  
}