#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() {
    // Turn on LEDs one by one in ascending order
    for (uint8_t i = 0; i < 8; i++) {
        LED_PORT |= (1 << i);  // Light up one LED at a time without turning off previous ones
        delay(200);  // Delay for visibility
    }
    
    // Turn off LEDs one by one in ascending order
    for (uint8_t i = 0; i < 8; i++) {
        LED_PORT &= ~(1 << i);  // Turn off one LED at a time
        delay(200);
    }
}