// Basic Arduino program to blink the built-in LED following MISRA C guidelines

#define LED_PIN 13U  // MISRA C: Use unsigned integer literals

void setup(void) {
    // Set the LED pin as an output
    pinMode(LED_PIN, OUTPUT); // MISRA C: Function should have a prototype in a header file
}

void loop(void) {
    digitalWrite(LED_PIN, HIGH);  // Turn LED on
    _delay_ms(1000U);             // Wait for a second - MISRA C: Use fixed-width delay function
    digitalWrite(LED_PIN, LOW);   // Turn LED off
    _delay_ms(1000U);             // Wait for a second
}