Darkness to light

void setup() {

  Serial.begin(9600); 
  pinMode(A5, INPUT);// for taking input from photoresistor
  pinMode(4, OUTPUT);//for the pin corresponding to blue
  pinMode(3, OUTPUT); //for the pin corresponding to green
  pinMode(2, OUTPUT); //for the pin corresponding to red
}

void loop() {
  // put your main code here, to run repeatedly:

  int ledOutput = (analogRead(A5));  //output of LDR is assigned to ledOutput
  
  int ledO = map(ledOutput, 1, 1023, 0, 254); 
  
  Serial.print("Lightread");
  Serial.println(ledO);       //read the output of the LDR on the serial monitor
  
   if (ledO >= 28) {          //if it is bright, turn off the light
    digitalWrite(4, LOW);
    digitalWrite(3, LOW);
    digitalWrite(2, LOW);
   }
  else if (ledO >= 20)        //little less bright, turn on blue light
  {
    digitalWrite(4, HIGH);
    digitalWrite(3, LOW);
    digitalWrite(3, LOW);
  }
     else if (ledO>= 9)       //turn on green light
  {
    digitalWrite(4, LOW);
    digitalWrite(3, HIGH);
    digitalWrite(2, LOW);
  }
    else                     //turn on all colurs
    {
    digitalWrite(4,HIGH);
    digitalWrite(3,HIGH);
    digitalWrite(2, HIGH);
    }
    
  delay(49);

}