Desk_Bell.ino

const int BUTTON = 2;
const int LED = 3;
const int BLINK_ON_INCREMENT = 50;
const int BLINK_PAUSE_INCREMENT = 75;
const int RING_TIME = 5000;

void setup() {
  pinMode(BUTTON, INPUT_PULLUP);
  pinMode(LED, OUTPUT);
  
  digitalWrite(LED, LOW);
  
  Serial.begin(9600);
}

void loop() {
  if(digitalRead(BUTTON) == LOW){
    buttonPushed();
  }
}

void buttonPushed() {
  Serial.println("button pressed");
  unsigned long endTime = millis()+RING_TIME;
  do{
    shortBlink();
    shortBlink();
    longBlink();
    longBlink();
    delay(250);
    Serial.println("millis");
    Serial.println(millis());
    Serial.println("endTime");
    Serial.println(endTime);
    Serial.println("");
  } while(millis() < endTime);
}

void longBlink() {
    blink(BLINK_ON_INCREMENT, BLINK_PAUSE_INCREMENT*2);
}

void shortBlink() {
  blink(BLINK_ON_INCREMENT, BLINK_PAUSE_INCREMENT);
}

void blink(int onTime, int offTime) {
  digitalWrite(LED, HIGH);
  delay(onTime);
  digitalWrite(LED, LOW);
  delay(offTime);
}