#include <LiquidCrystal.h>

// LCD pins: RS, E, D4, D5, D6, D7
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

// LED pins
int redLED = 13;
int yellowLED = 12;
int greenLED = 11;

// Countdown function
void countdown(int totalSeconds, const char* message) {
  for (int i = totalSeconds; i > 0; i--) {
      int minutes = i / 60;
          int seconds = i % 60;

              lcd.clear();
                  lcd.setCursor(0, 0);
                      lcd.print(message);

                          lcd.setCursor(0, 1);
                              lcd.print("Time: ");
                                  lcd.print(minutes);
                                      lcd.print(":");

                                          if (seconds < 10) {
                                                lcd.print("0");
                                                    }
                                                        lcd.print(seconds);

                                                            delay(1000);
                                                              }
                                                              }

                                                              void setup() {
                                                                // Set LED pins as output
                                                                  pinMode(redLED, OUTPUT);
                                                                    pinMode(yellowLED, OUTPUT);
                                                                      pinMode(greenLED, OUTPUT);

                                                                        // Start LCD
                                                                          lcd.begin(16, 2);
                                                                            lcd.print("Traffic Light");
                                                                              lcd.setCursor(0, 1);
                                                                                lcd.print("System Ready");

                                                                                  delay(2000);
                                                                                    lcd.clear();
                                                                                    }

                                                                                    void loop() {
                                                                                      // RED light
                                                                                        digitalWrite(redLED, HIGH);
                                                                                          digitalWrite(yellowLED, LOW);
                                                                                            digitalWrite(greenLED, LOW);
                                                                                              countdown(60, "RED - STOP");



                                                                                              // YELLOW light
                                                                                                            digitalWrite(redLED, LOW);
                                                                                                              digitalWrite(yellowLED, HIGH);
                                                                                                                digitalWrite(greenLED, LOW);
                                                                                                                  countdown(30, "YELLOW - WAIT");

                                                                                                // GREEN light
                                                                                                  digitalWrite(redLED, LOW);
                                                                                                    digitalWrite(yellowLED, LOW);
                                                                                                      digitalWrite(greenLED, HIGH);
                                                                                                        countdown(60, "GREEN - GO");

                              
                                                                                                                  }