#define LED_PORT PORTA  // Define PORTA as LED output
#define LED_DDR DDRA    // Define Data Direction Register for PORTA

void setup() {
    LED_DDR = 0xFF;  // Set all PORTA pins as output (pins 22-29)
}

void loop() {
    LED_PORT = 0xFF;  // Turn all LEDs ON
    delay(500);
    LED_PORT = 0x00;  // Turn all LEDs OFF
    delay(500);
}