const int buttonPin = 2; // Button pin from SAMD11C14A 
const int ledPin = 4; // LED pin from SAMD11C14A 
int ledState = LOW; // Current LED state
bool previousButtonState = HIGH; // Previous button state, assuming pull-up

void setup() {
  pinMode(ledPin, OUTPUT); // Initialize LED pin as output
  pinMode(buttonPin, INPUT_PULLUP); // Initialize button pin as input with pull-up resistor
}

void loop() {
  bool currentButtonState = digitalRead(buttonPin);
  if (currentButtonState == LOW && previousButtonState == HIGH) {
    // Button was pressed
    ledState = !ledState; // Toggle the LED state
    digitalWrite(ledPin, ledState); // Set the LED to the new state
  }
  previousButtonState = currentButtonState; // Update the previous button state
}