كود أردوينو لتشغيل واطفاء 4 ليدات

    int Led1=13;
    int Led2=12;
    int Led3=11;
    int Led4=10;

void setup() {
     Serial.begin(9600);
     Serial.println("Setup Start....");

     pinMode(Led1,OUTPUT);
     pinMode(Led2,OUTPUT);
     pinMode(Led3,OUTPUT);
     pinMode(Led4,OUTPUT);

     digitalWrite(Led1,LOW);
     digitalWrite(Led2,LOW);
     digitalWrite(Led3,LOW);
     digitalWrite(Led4,LOW);
     
     Serial.println("Setup End....");}

void loop() {
     Serial.println("---------------------------------------");
     delay(5000);
     Serial.println("Loop Start");
     delay(5000);

     digitalWrite(Led1,HIGH);    // turn the LED on (HIGH is the voltage level)
     delay(1000);
     digitalWrite(Led2,HIGH);
     delay(1000);
     digitalWrite(Led3,HIGH);
     delay(1000);
     digitalWrite(Led4,HIGH);
     delay(20000);              // wait for 5 a second

     digitalWrite(Led4,LOW);
     delay(1000);
     digitalWrite(Led3,LOW);
     delay(1000);
     digitalWrite(Led2,LOW);
     delay(1000);
     digitalWrite(L1,LOW);
     delay(1000);

     Serial.println("Loop End");
}