//press the blue button to turn on the LED
//Release the blue button to turn off the LED

#define BUTTON_PIN 4
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(BUTTON_PIN, INPUT_PULLUP);

}


// the loop function runs over and over again forever
void loop() {
  int value = digitalRead((BUTTON_PIN));
    if (value == HIGH) {
      digitalWrite(LED_BUILTIN, LOW);
    }
    if (value == LOW) {
      digitalWrite(LED_BUILTIN, HIGH);
    }
  }