void setup() {
  // Set PB0 as an output pin, which will control the LED
  pinMode(PB0, OUTPUT);
}

void loop() {
  // Turn the LED on by setting PB0 to HIGH
  digitalWrite(PB0, HIGH);

  // Wait for 1 second (1000 milliseconds) while the LED is on
  delay(1000);

  // Turn the LED off by setting PB0 to LOW
  digitalWrite(PB0, LOW);

  // Wait for 1 second (1000 milliseconds) while the LED is off
  delay(1000);
}