int ledPins[8] = {2,3,4,5,6,7,8,9};
  int PIRPin = 12;                        // input pin (for PIR sensor)
  int pirState = LOW;                     // we start, assuming no motion detected
  int PIRval = 0;                         // variable for reading the pin status
  
  int NumOfLEDs = 6;                      // Number of LEDs.. change if you add more
  long randNumber;
  int OnceOrTwice;
  long delaytime;
  int Ctr;
  long LEDval;
  unsigned long TimeToAllOn;

void setup() {

  int index;
  pinMode(PIRPin, INPUT);                 // declare sensor as input
  randomSeed(analogRead(0));
  Serial.begin(9600);

  for(index = 0; index <= (NumOfLEDs- 1); index++) {
    pinMode(ledPins[index],OUTPUT);
    // ledPins[index] is replaced by the value in the array.
    // For example, ledPins[0] is 2
  }

}

// the loop function runs over and over again forever
void loop() {

  PIRval = digitalRead(PIRPin);         // read input value of PIR

    if (PIRval == HIGH)   {             // check if the input is HIGH
      Serial.println("Button pressed");
      if (pirState == LOW) {              // we have just turned ON
        Serial.println("Motion detected!");
        pirState = HIGH;
    }
  
  randomOnLED();                        // Randomly turn ON all LEDs
  TimeToAllOn = millis();
  Serial.print("ALL ON in ");
  Serial.println(TimeToAllOn / 1000.0, 3);

  randomBlinkLED();                     // Randomly blink an LED
  Serial.println("blink complete");
  } else {
    if (pirState == HIGH) {              // we have just turned OFF
      Serial.println("Motion ended!");
      pirState = LOW;
    }
  }
                                        // Turn off all LEDs
}

//  /*
//  randomOnLED()
//  */
void randomOnLED()  {
  int Ctr;
  int randNumber;
  Ctr = 1;
  // Serial.begin(9600);

  while (Ctr < (NumOfLEDs + 1)) {

  randNumber = random(NumOfLEDs);                      // generate a random number from 0 to 5

  // Check the status of a randomly selected LED
  // If its already ON, try again
  // Serial.println(ledPins[randNumber]);
  LEDval = digitalRead(ledPins[randNumber]);

  // Serial.println(LEDval);
  // Serial.println(randNumber);

  if (LEDval == HIGH) {                       // LED is already on. Lower the Ctr by one and try again.
    Ctr--;
    // Serial.println("ON");
  }
  if (LEDval == LOW) {
    Serial.println("OFF");
    digitalWrite(ledPins[randNumber], HIGH);  // turn the LED on (HIGH is the voltage level)
    delay(randNumber * 500);                  // wait for a random time
  }
  Ctr++;
  Serial.println(Ctr);
  }

  }

//  /*
//  randomBlinkLED()
//  */
void randomBlinkLED() {
  int i;
  int Ctr;
  int randNumber;
  int RndNum2;
  Ctr = 1;
  Serial.begin(9600);

  while (PIRval == HIGH) {
  //  while (Ctr < 16) {                           // Count 15 Blinks

  randNumber = random(NumOfLEDs);              // generate a random number from 0 to (Number of LEDs - 1)
  RndNum2 = random(5);                         // random number to change DELAY times
  OnceOrTwice = random(1, 3);                  // randomly select to blink ONCE or TWICE

  delay(RndNum2 * 500);                        // wait for a random time before staring to blink an LED

  Serial.print("Pin #");
  Serial.print(ledPins[randNumber]);
  Serial.print(" ,Blink ");
  Serial.print(OnceOrTwice);
  Serial.println(" time(s)");

  // Cause a randomly selected LED to blink
  for (i = 1; i <= OnceOrTwice; i++) {
    digitalWrite(ledPins[randNumber], LOW);  // turn the LED off 
    delay(200);                              // wait
    digitalWrite(ledPins[randNumber], HIGH); // turn the LED back on 
    delay(RndNum2 * 200);
    }
    PIRval = digitalRead(PIRPin);         // read input value of PIR
  Ctr++;
  }
  Serial.println(Ctr);
  }