#define LED_PIN PA5
#define BUTTON_PIN PC13

bool ledState = false;
bool lastButtonState = HIGH;

void setup() {

pinMode(LED_PIN, OUTPUT);
pinMode(BUTTON_PIN, INPUT_PULLUP);

}

void loop() {
  
bool buttonState = digitalRead(BUTTON_PIN);

if (lastButtonState == HIGH && buttonState == LOW)
{

ledState = !ledState;

digitalWrite(LED_PIN, ledState);


}
delay(10);
lastButtonState = buttonState;
}