int pirPin = 12;
int mp3 = 13;
int pirState = 0;

void setup(){

//Set all the pinModes
  pinMode(pirPin, INPUT);
  //pinMode(mp3, INPUT_PULLUP);
  pinMode(mp3, OUTPUT); // HIGH could be used with a transistor to momentarily connect DFPlayer Mini IO_2 pin to ground to trigger.
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);

  Serial.begin(9600);
}

void loop(){
  //Set all the led pins to LOW so all the "eyes" are off.
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  digitalWrite(6, LOW);
  digitalWrite(7, LOW);
  digitalWrite(8, LOW);
  digitalWrite(9, LOW);
  digitalWrite(10, LOW);
  digitalWrite(11, LOW);
  delay(500);
  
  pirState = digitalRead(pirPin);

  if(pirState == HIGH){
    // Trigger the mp3 by pulling the IO_2 to ground for .25 second:
    //digitalWrite(mp3, LOW);
    digitalWrite(mp3, HIGH);
    delay(250);
    /* I may have to then:
    digitalWrite(mp3, HIGH);
    delay(250);
    */  

      //Turn the "eyes" on pin 2 On then waits a random time from 1 to 2 seconds.
      digitalWrite(2, HIGH);
      delay(random(1000,2000));

      digitalWrite(6, HIGH);
      delay(random(1000,2000));

      //Blink the "eyes" on pin 2.
      digitalWrite(2, LOW); //Turns the "eyes" off.
      delay(random(100,250)); //Waits a random time from .10 to .25 seconds.
      digitalWrite(2, HIGH); //Turns the "eyes" on.
      delay(random(1000,2500)); //Waits a random time from 1 to 2.5 seconds.

      digitalWrite(9, HIGH);
      delay(random(750,2000));

      digitalWrite(6, LOW);
      delay(random(100,250));
      digitalWrite(6, HIGH);
      delay(random(500,2000));

      digitalWrite(2, LOW);
      delay(random(100,250));
      digitalWrite(2, HIGH);
      delay(random(500,1500));

      digitalWrite(3, HIGH);
      delay(random(500,1000));

      digitalWrite(9, LOW);
      delay(random(100,250));
      digitalWrite(9, HIGH);
      delay(random(500,1500));

      digitalWrite(3, LOW);
      delay(random(100,250));
      digitalWrite(3, HIGH);
      delay(random(1000,1500));

      digitalWrite(2, LOW);
      delay(random(100,250));
      digitalWrite(2, HIGH);
      delay(random(1000,1500));

      digitalWrite(4, HIGH);
      delay(random(700,1000));

      digitalWrite(9, LOW);
      delay(random(100,250));
      digitalWrite(9, HIGH);
      delay(random(1000,1500));

      digitalWrite(11, HIGH);
      delay(random(500,1500));

      digitalWrite(6, LOW);
      delay(random(100,250));
      digitalWrite(6, HIGH);
      delay(random(1000,1500));

      digitalWrite(3, LOW);
      delay(random(100,250));
      digitalWrite(3, HIGH);
      delay(random(1000,1500));

      digitalWrite(7, HIGH);
      delay(random(750,1500));

      digitalWrite(9, LOW);
      delay(random(100,250));
      digitalWrite(9, HIGH);
      delay(random(800,1500));

      digitalWrite(10, HIGH);
      delay(random(1000,1500));

      digitalWrite(4, LOW);
      delay(random(100,250));
      digitalWrite(4, HIGH);
      delay(random(1000,1500));

      digitalWrite(11, LOW);
      delay(random(100,250));
      digitalWrite(11, HIGH);
      delay(random(750,1500));

      digitalWrite(5, HIGH);
      delay(random(1000,1500));

      digitalWrite(3, HIGH);
      delay(random(500,1500));

      digitalWrite(2, LOW);
      delay(random(100,250));
      digitalWrite(2, HIGH);
      delay(random(750,1500));

      digitalWrite(5, LOW);
      delay(random(100,250));
      digitalWrite(5, HIGH);
      delay(random(1000,1500));

      digitalWrite(6, LOW);
      delay(random(500,2000));

      digitalWrite(9, LOW);
      delay(random(100,250));
      digitalWrite(9, HIGH);
      delay(random(500,1500));

      digitalWrite(2, LOW);
      delay(random(1000,1500));

      digitalWrite(8, HIGH);
      delay(random(500,1500));

      digitalWrite(7, LOW);
      delay(random(100,250));
      digitalWrite(7, HIGH);
      delay(random(700,1500));

      digitalWrite(9, LOW);
      delay(random(150,250));

      digitalWrite(8, LOW);
      delay(random(100,250));
      digitalWrite(8, HIGH);
      delay(random(750,1500));

      digitalWrite(10, LOW);
      delay(random(100,250));
      digitalWrite(10, HIGH);
      delay(random(500,1500));

      digitalWrite(4, LOW);
      delay(random(500,5500));

      digitalWrite(11, LOW);
      delay(random(100,250));
      digitalWrite(11, HIGH);
      delay(random(750,1500));

      digitalWrite(7, LOW);
      delay(random(500,1000));

      digitalWrite(10, LOW);
      delay(random(100,250));
      digitalWrite(10, HIGH);
      delay(random(400,1000));

      digitalWrite(5, LOW);
      delay(random(100,250));
      digitalWrite(5, HIGH);
      delay(random(700,1500));

      digitalWrite(10, LOW);
      delay(random(100,250));
      digitalWrite(10, HIGH);
      delay(random(500,1000));

      digitalWrite(5, LOW);
      delay(random(100,250));

      digitalWrite(11, LOW);
      delay(random(1000,2000));

      digitalWrite(10, LOW);
      delay(random(1000,2500));

      digitalWrite(3, LOW);
      delay(random(1000,2500));

      digitalWrite(8, LOW);
      delay(30000);
      //delay to prevent retrigger by guests
  }
  else {
    // keep the mp3 pin off:
    //digitalWrite(mp3, HIGH);
    digitalWrite(mp3, LOW);
    delay(1000);
  }
}