// Set pin 0 as an output
const int ledPin = 0;

void blink_led(int times) {
  for (int i = 0; i < times; i++) {
    digitalWrite(ledPin, HIGH);
    delay(200);
    digitalWrite(ledPin, LOW);
    delay(300);
  }
}

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

void loop() {
  for (int i = 0; i < 5; i++) {
    blink_led(i);         // Blink i times
    delay(2000);          // Wait for 2 seconds
  }
}