// Define pins for the traffic lights
const int redPin = 1;
const int yellowPin = 2;
const int greenPin = 3;
int button= 4;
int ledfix =13;

// Define timing variables
unsigned long previousMillis = 0;
const long intervalRed = 5000;    // Red light interval (5 seconds)
const long intervalGreen = 3000;  // Green light interval (3 seconds)
const long intervalYellow = 2000; // Yellow light interval (2 seconds)

// Define states for the traffic light
enum LightState {
  RED,
  GREEN,
  YELLOW
};

LightState currentLightState = RED;

void setup() {
  // Initialize the pins as outputs
  pinMode(redPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(button, INPUT );
}

void loop() {
  unsigned long currentMillis = millis(); // Get the current time
  
  switch(currentLightState) {
    case RED:
      // Turn on the red light
      digitalWrite(redPin, HIGH);
      digitalWrite(yellowPin, LOW);
      digitalWrite(greenPin, LOW);
      
      // Check if it's time to switch to green
      if (currentMillis - previousMillis >= intervalRed) {
        previousMillis = currentMillis;
        currentLightState = GREEN;
      }
      break;
      
    case GREEN:
      // Turn on the green light
      digitalWrite(redPin, LOW);
      digitalWrite(yellowPin, LOW);
      digitalWrite(greenPin, HIGH);
      
      // Check if it's time to switch to yellow
      if (currentMillis - previousMillis >= intervalGreen) {
        previousMillis = currentMillis;
        currentLightState = YELLOW;
      }
      break;
      
    case YELLOW:
      // Turn on the yellow light
      digitalWrite(redPin, LOW);
      digitalWrite(yellowPin, HIGH);
      digitalWrite(greenPin, LOW);
      
      // Check if it's time to switch to red
      if (currentMillis - previousMillis >= intervalYellow) {
        previousMillis = currentMillis;
        currentLightState = RED;
      }
      break;
      case ledfix:
      if 
      (digitalRead(button)
      button == HIGH);
       digitalWrite(redPin, LOW);
      digitalWrite(yellowPin, LOW);
      digitalWrite(greenPin, LOW);
      digitalWrite(LEDFIX,HIGH);
      
      else 
      digitalWrite(LEDFIX,LOW);


      
      // Check if it's time to switch to red
      if (currentMillis - previousMillis >= intervalYellow) {
        previousMillis = currentMillis;
        currentLightState = RED;
      }
      break;

  }
  
}