void setup() {
    pinMode(1, INPUT_PULLUP);  // Set PB1 (Pin 1) as input with internal pull-up resistor
      pinMode(2, OUTPUT);        // Set PB2 (Pin 2) as output
      }

      void loop() {
        if (digitalRead(1) == LOW) {  // Check if the button (connected to PB1) is pressed
            digitalWrite(2, HIGH);       // Turn on LED (connected to PB2)
              } else {
                  digitalWrite(2, LOW);        // Turn off LED
                    }
                    }