const float GAMMA = 0.7;
const float RL10 = 50;
unsigned long previousMillis = 0;
const long interval = 1000; 
void setup() {
  pinMode(13, INPUT); 
  pinMode(12, INPUT); 
 
  Serial.begin(9600);
}

void loop() {
   unsigned long currentMillis = millis();
 int val = digitalRead(13);  
   int value = analogRead(A0);            
   int analogValue = analogRead(A0);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));



   
    

    // Handle traffic light sequence without delay
    if (currentMillis - previousMillis >= interval && lux < 50 && val == HIGH)
    {
        previousMillis = currentMillis;

        
    
          digitalWrite(12,HIGH);
        
      
    }else if(currentMillis - previousMillis >= interval){
  digitalWrite(12,LOW);     
    }
}