Untitled

int ledPin = 9;
void setup()
{
  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);
}
// the loop routine runs over and over again forever:
void loop()
{
  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  
  // print out the value you read:
  Serial.println(sensorValue); // LDR sensor value
  delay(50); //short delay for faster response to light.
   if(sensorValue >= 700){
    analogWrite(ledPin, 255);
    delay(30);
   }
   if(sensorValue<=700)
   {
    analogWrite(ledPin, 0);
    delay(30);
   }
  
}