#define LED 4
#define LED1 5
#define ldr 32
float ADC_value = 0.0048828125;
void setup() {
Serial.begin(9600);
pinMode(ldr, INPUT);   
pinMode(LED, OUTPUT); 
pinMode(LED1, OUTPUT); 

  for(int i = 0; i < 5; i++){
   digitalWrite(LED1, LOW);             
   digitalWrite(LED, LOW);
   delay(1000); 
  digitalWrite(LED1, HIGH);
  digitalWrite(LED, HIGH);
  delay(1000);  
  digitalWrite(LED1, LOW);
  digitalWrite(LED, LOW);
 }
}
void loop(
  digitalWrite(LED1, HIGH);
  delay(1000);
  digitalWrite(LED1, LOW);
  delay(1000);
  float ldr_data = analogRead(ldr); 
  int lux = int((250.000000/(ADC_value*ldr_data))-50.000000);
  if(lux < 250){
    digitalWrite(LED, LOW);
 
  }
  else if (lux >= 150){
      digitalWrite(LED, HIGH);

  }

)