const int PIRpin = 3;
const int LDRpin = 0;
const int LEDpin1 = 5;
const int LEDpin2 = 6;
const int LEDpin3 = 7;
const int LEDpin4 = 8;
const int LEDpin5 = 9;
const int LEDpin6 = 10;


void setup() {
  pinMode(PIRpin, INPUT_PULLUP); // I'm assuming PIRpin is active low, it might not be.
  pinMode(LEDpin1, OUTPUT); // Add more LED pins for each of them
  pinMode(LEDpin2, OUTPUT); // Add more LED pins for each of them
  pinMode(LEDpin3, OUTPUT); // Add more LED pins for each of them
  pinMode(LEDpin4, OUTPUT); // Add more LED pins for each of them
  pinMode(LEDpin5, OUTPUT); // Add more LED pins for each of them
  pinMode(LEDpin6, OUTPUT); // Add more LED pins for each of them

}

void loop() {

  int LDR;
  int LEDs;

  if(digitalRead(PIRpin) == LOW) // Is the PIR low?
  {
      LDR = analogRead(LDRpin);
      LEDs = int(map(LDR,0,1023,6,1)); // Maps the 0-1023 reading from the LDR to between 6 (if the room is dark) and 1 (if the room is light) LEDs

      switch(LEDs)
      {
       case 6:
         digitalWrite(LEDpin6,HIGH);
       case 5:
         digitalWrite(LEDpin5,HIGH);
       case 4:
         digitalWrite(LEDpin4,HIGH);
       case 3:
         digitalWrite(LEDpin3,HIGH);
       case 2:
         digitalWrite(LEDpin2,HIGH);
       case 1:
         digitalWrite(LEDpin1,HIGH);
      }


  }
  else
  {
         digitalWrite(LEDpin6,LOW);
         digitalWrite(LEDpin5,LOW);
         digitalWrite(LEDpin4,LOW);
         digitalWrite(LEDpin3,LOW);
         digitalWrite(LEDpin2,LOW);
         digitalWrite(LEDpin1,LOW);
  }

}