unsigned char port1 = 0b00000010;  
unsigned char port2 = 0b00000100;  
unsigned char port3 = 0b00001000;  
unsigned char port4 = 0b00010000;  
unsigned char port5 = 0b00100000;  
unsigned char port6 = 0b01000000;  
unsigned char port7 = 0b10000000;   

void function1(uint8_t x) {
    PORTD = x;  
}

void setup() {
    
    DDRD = 0b11111111; 
}

void loop() {
    // وضع الكود الرئيسي هنا، ليعمل بشكل متكرر:
    for (int i = 0; i <= 9; i++) {
        function2(i);
        delay(1000);
    }

    for (int i = 9; i >= 0; i--) {
        function2(i);
        delay(1000);
    }
}

void function2(unsigned char i) {
    uint8_t x = 0; // متغير لحفظ النمط

    switch (i) {
        case 0:
            x = port1 | port2 | port3 | port4 | port5 | port6; // تفعيل الأجزاء المطلوبة
            break;
        case 1:
            x = port2 | port3;
            break;
        case 2:
            x =  port1 | port2 |port4 | port5 | port7;
            break;
        case 3:
            x = port1 | port2 | port3 |port4 | port7;
            break;
        case 4:
            x = port2 | port3 |port6 | port7;
            break;
        case 5:
            x = port1 | port3 | port4 | port6 | port7;
            break;
        case 6:
            x =  port1 | port3 | port4 | port5 | port6|port7;
            break;
        case 7:
            x =  port1 | port2 | port3;
            break;
        case 8:
            x =port1 | port2 | port3 | port4 | port5 | port6 |port7;
            break;
             case 9:
            x = port1 | port2 | port3 | port4 | port6 |port7;
            break;
    }

    function1(x); 
}