const int buttonPin = 27;    // the number of the pushbutton pin
const int ledPin1 = 26;      // the number of the first LED pin
const int ledPin2 = 0;      // the number of the second LED pin
const int ledPin3 = 1;      // the number of the third LED pin

int buttonState = 0;        // variable for reading the pushbutton status
int lastButtonState = 0;    // variable to store the previous state of the button
unsigned long pressStartTime = 0; // variable to store the time when button was pressed
unsigned long pressDuration = 0;  // variable to store the duration of button press

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
  // Initialize serial communication:
  Serial.begin(9600);
}

void loop() {
  // read the state of the pushbutton value:
  int reading = digitalRead(buttonPin);

  // check if the button state has changed
  if (reading != lastButtonState) {
    // reset the debouncing timer
    pressStartTime = millis();
  }

  // if the button is pressed
  if (reading == HIGH) {
    pressDuration = millis() - pressStartTime;

    if (pressDuration < 1000) {
      digitalWrite(ledPin1, HIGH);
    } 
    else if (pressDuration >= 1000 && pressDuration < 2000) {
      digitalWrite(ledPin2, HIGH);
    } 
    else if (pressDuration >= 2000 && pressDuration < 3000) {
      digitalWrite(ledPin3, HIGH);
    } 
    else if (pressDuration >= 3000) {
      digitalWrite(ledPin1, LOW);
      digitalWrite(ledPin2, LOW);
      digitalWrite(ledPin3, LOW);
    }
  } 
  

  // save the current button state for comparison in the next loop iteration
  lastButtonState = reading;
}