// Define the original Road A and Road B LEDs
#define RED_A 1       // Road A Red LED
#define YELLOW_A 5    // Road A Yellow LED
#define GREEN_A 9     // Road A Green LED

#define RED_B 28      // Road B Red LED
#define YELLOW_B 27   // Road B Yellow LED
#define GREEN_B 26    // Road B Green LED

// Define the new Road C and Road D LEDs
#define RED_C 15      // Road C Red LED
#define YELLOW_C 14   // Road C Yellow LED
#define GREEN_C 13    // Road C Green LED

#define RED_D 18      // Road D Red LED
#define YELLOW_D 19   // Road D Yellow LED
#define GREEN_D 20    // Road D Green LED

void setup() {
  // Initialize serial communication
    Serial1.begin(115200);
      Serial1.println("Traffic Light System Initialized!");

        // Set all Road A and Road B LED pins as OUTPUT
          pinMode(RED_A, OUTPUT);
            pinMode(YELLOW_A, OUTPUT);
              pinMode(GREEN_A, OUTPUT);
                
                  pinMode(RED_B, OUTPUT);
                    pinMode(YELLOW_B, OUTPUT);
                      pinMode(GREEN_B, OUTPUT);

                        // Set all Road C and Road D LED pins as OUTPUT
                          pinMode(RED_C, OUTPUT);
                            pinMode(YELLOW_C, OUTPUT);
                              pinMode(GREEN_C, OUTPUT);

                                pinMode(RED_D, OUTPUT);
                                  pinMode(YELLOW_D, OUTPUT);
                                    pinMode(GREEN_D, OUTPUT);
                                    }

                                    void setLights(int roadA_Red, int roadA_Yellow, int roadA_Green, int roadB_Red, int roadB_Yellow, int roadB_Green,
                                                   int roadC_Red, int roadC_Yellow, int roadC_Green, int roadD_Red, int roadD_Yellow, int roadD_Green) {
                                                     // Control the lights for Road A
                                                       digitalWrite(RED_A, roadA_Red);
                                                         digitalWrite(YELLOW_A, roadA_Yellow);
                                                           digitalWrite(GREEN_A, roadA_Green);

                                                             // Control the lights for Road B
                                                               digitalWrite(RED_B, roadB_Red);
                                                                 digitalWrite(YELLOW_B, roadB_Yellow);
                                                                   digitalWrite(GREEN_B, roadB_Green);

                                                                     // Control the lights for Road C
                                                                       digitalWrite(RED_C, roadC_Red);
                                                                         digitalWrite(YELLOW_C, roadC_Yellow);
                                                                           digitalWrite(GREEN_C, roadC_Green);

                                                                             // Control the lights for Road D
                                                                               digitalWrite(RED_D, roadD_Red);
                                                                                 digitalWrite(YELLOW_D, roadD_Yellow);
                                                                                   digitalWrite(GREEN_D, roadD_Green);
                                                                                   }

                                                                                   void loop() {
                                                                                     // Step 1: Road A and C Green, Road B and D Red
                                                                                       setLights(LOW, LOW, HIGH, HIGH, LOW, LOW, LOW, LOW, HIGH, HIGH, LOW, LOW);
                                                                                         delay(5000); // Keep this state for 5 seconds

                                                                                           // Step 2: Road A and C Yellow, Road B and D Red
                                                                                             setLights(LOW, HIGH, LOW, HIGH, LOW, LOW, LOW, HIGH, LOW, HIGH, LOW, LOW);
                                                                                               delay(2000); // Keep this state for 2 seconds

                                                                                                 // Step 3: Road A and C Red, Road B and D Green
                                                                                                   setLights(HIGH, LOW, LOW, LOW, LOW, HIGH, HIGH, LOW, LOW, LOW, LOW, HIGH);
                                                                                                     delay(5000); // Keep this state for 5 seconds

                                                                                                       // Step 4: Road A and C Red, Road B and D Yellow
                                                                                                         setLights(HIGH, LOW, LOW, LOW, HIGH, LOW, HIGH, LOW, LOW, LOW, HIGH, LOW);
                                                                                                           delay(2000); // Keep this state for 2 seconds
                                                                                                           }