#define BUTTON_PIN 4


void setup() {

//Initialise digital pin LED_BUILTIN as an output
pinMode(LED_BUILTIN, OUTPUT);

//Starting message
Serial.begin(9600);
Serial.println("Starting up");


//set up of button
  Serial.begin(115200);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
}

//button:
//sets last state as unreleased
int lastState = HIGH;

void loop() {

  int value = digitalRead((BUTTON_PIN));

// When button is pressed
  if (value == LOW) {

    //Display message (Yellow light)
    Serial.println("Button pressed");
    delay(500);

    //Flashes LED (Red light)
    digitalWrite(LED_BUILTIN, HIGH);
    delay(500);

    digitalWrite(LED_BUILTIN, LOW);
    delay(500);
    
  }

//When button is not pressed
  if (value == HIGH) {
    Serial.println("Program Ready: Hold button to run");
    delay(5000);
  }

}