const int buttonPin = 16;  
const int ledPin = 33;     

void setup() {
  pinMode(buttonPin, INPUT_PULLUP); 
  pinMode(ledPin, OUTPUT);          
}

void loop() {
  if (digitalRead(buttonPin) == LOW) {
    // LED pattern: 3 long, 2 short, 3 very short
    blink(3, 500);  // 3 long blinks
    blink(2, 200);  // 2 short blinks
    blink(3, 100);  // 3 very short blinks
    delay(1000);    
  }
}

void blink(int times, int duration) {
  for (int i = 0; i < times; i++) {
    digitalWrite(ledPin, HIGH);  
    delay(duration);              
    digitalWrite(ledPin, LOW);   
    delay(duration);              
  }
}