 
 void loop()
 {
-  photocell_reading = analogRead(photocell_pin);
-  
+  // PHOTOCELL
   // When it gets bright or dark, make a sound.
   // Don't play the sound again until it's normal lighting out.
+  photocell_reading = analogRead(photocell_pin);
+  
   if ( photocell_reading >= 700 && photocell_reading <= 710 )
   {
     normal_light_flag = 1;

Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();

// These are the minimum and maximum pulse length counts (out of 4096).
#define BIG_SERVO_MIN 160
#define BIG_SERVO_MAX 584
#define MICRO_SERVO_MIN 160
#define MICRO_SERVO_MAX 584


  4, 4, 4, 4, 4, 4, 2, 4, 4, 2, 4, 4, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2
};

int twinkle_twinkle_notes[] = {
  NOTE_C4, NOTE_C4, NOTE_G4, NOTE_G4, NOTE_A4, NOTE_A4, NOTE_G4, NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, NOTE_D4, NOTE_C4, NOTE_G4, NOTE_G4, NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, NOTE_G4, NOTE_G4, NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_C4, NOTE_G4, NOTE_G4, NOTE_A4, NOTE_A4, NOTE_G4, NOTE_F4, NOTE_F4, NOTE_E4, NOTE_E4, NOTE_D4, NOTE_D4, NOTE_C4
};
int twinkle_twinkle_lengths[] = {
  4, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 4, 4, 2
};

void setup()
{
  // Initialize serial port at 9600 baud.
