const int red_Led_L = 13;
const int yellow_Led_L = 12;
const int green_Led_L = 11;

const int red_Led_R = 5;
const int yellow_Led_R = 4;
const int green_Led_R = 3;

void setup() {

    pinMode(red_Led_L, OUTPUT);
    pinMode(yellow_Led_L, OUTPUT);
    pinMode(green_Led_L, OUTPUT);
    pinMode(red_Led_R, OUTPUT);
    pinMode(yellow_Led_R, OUTPUT);
    pinMode(green_Led_R, OUTPUT);

    digitalWrite(red_Led_R, HIGH);
    digitalWrite(green_Led_L, HIGH);
    delay(3000);
}

void loop() {
   
    for (int i = 0 ; i <= 2 ; i++){ 
        digitalWrite(green_Led_L, LOW);
        delay(500);
        digitalWrite(green_Led_L, HIGH);
        delay(500);
    }
    digitalWrite(green_Led_L, LOW); 

    digitalWrite(yellow_Led_L, HIGH); 
    delay(2000); 
    digitalWrite(yellow_Led_L, LOW); 
    digitalWrite(red_Led_L, HIGH); 
    digitalWrite(red_Led_R, LOW); 
    digitalWrite(green_Led_R, HIGH); 

    delay(4000); 

    for (int i = 0; i <= 2; i++){ 
        digitalWrite(green_Led_R, LOW);
        delay(500);
        digitalWrite(green_Led_R, HIGH);
        delay(500);
    }
    digitalWrite(green_Led_R, LOW); 

    digitalWrite(yellow_Led_R, HIGH); 
    delay(2000); 
    digitalWrite(yellow_Led_R, LOW); 
    digitalWrite(red_Led_R, HIGH); 
    digitalWrite(red_Led_L, LOW); 
    digitalWrite(green_Led_L, HIGH); 

    delay(4000); 
}