#define LED_PORT PORTA  // Port where LEDs are connected
#define LED_DDR DDRA    // Data direction register for LED port

#define JOY_Y A0        // Joystick Y-axis connected to A0
#define JOY_X A2        // Joystick X-axis connected to A2
#define BUTTON_PIN 2    // Push button connected to digital pin 2

void setup() {
    LED_DDR = 0xFF;      // Set PORTA (A22-A29) as output (all LEDs)
    pinMode(BUTTON_PIN, INPUT_PULLUP);  // Set button pin as input with pull-up resistor
}

void loop() {
    int adcX = analogRead(JOY_X);  // Read X-axis of the joystick
    int adcY = analogRead(JOY_Y);  // Read Y-axis of the joystick
    bool buttonState = digitalRead(BUTTON_PIN) == LOW;  // Button is active LOW

    uint8_t ledPattern = 0;  // Default LED pattern (all LEDs OFF)

    if (buttonState) {
        // Read Y-axis if button is pressed
        if (adcY < 300) {
            ledPattern = 0b00001111;  // Lower half LEDs ON
        } else if (adcY > 700) {
            ledPattern = 0b11110000;  // Upper half LEDs ON
        }
    } else {
        // Read X-axis if button is not pressed
        if (adcX < 300) {
            ledPattern = 0b10000000;  // Leftmost LED ON
        } else if (adcX > 700) {
            ledPattern = 0b00000001;  // Rightmost LED ON
        }
    }

    LED_PORT = ledPattern;  // Output the LED pattern to the LEDs
}