How to do this task?

Projects Programming
8 
#define light_Sensor A0 // cant do space between words

void setup() {
  pinMode (9, OUTPUT);

  pinMode(10, OUTPUT);

  pinMode(11, OUTPUT);

  pinMode(light_Sensor, INPUT);

  Serial.begin(9600);
}

void loop(){
  int lightLevel = analogRead(light_Sensor);  Serial.println(lightLevel);
  if(lightLevel <= 255){ // 1023 / 4 = 225
    digitalWrite(9,HIGH);
    digitalWrite(10,HIGH);
    digitalWrite(11,HIGH);
  }
  else if(lightLevel <= 510 && lightLevel >= 255){ // 225*2 = 510
    digitalWrite(9,HIGH);
    digitalWrite(10,HIGH);
    digitalWrite(11,LOW);
  }
  else if(lightLevel <= 765 && lightLevel >= 510){ // 225*3 = 765
    digitalWrite(9,HIGH);
    digitalWrite(10,LOW);
    digitalWrite(11,LOW);
  }
  else if(lightLevel <= 1023 && lightLevel >= 765){ // 225*4 = 1023
    digitalWrite(9,LOW);
    digitalWrite(10,LOW);
    digitalWrite(11,LOW);
  }
}

in short (just 3 leds) this is it.
u need to put the curect time (lightLevel <= 510 && lightLevel >= 255) and that it
i didnt change so much of ur code.
now just add 3 more leds, goos luck