/* 
 Nursery Rhyme Hat
 Liz Huessy
 March 2014
 */

int ledPin = A3;  // The white LED pin is connected to pin A3
int redPin = 10;  // The red LED pin is connected to pin 10
int bluePin = 9;  // The blue LED pin is connected to pin 9
int greenPin = 6;// The green LED pin is connected to pin 6
int ground = 11; // Pin 11 is the ground pin
int speakerPin = A2;     // The speaker is connected to digital pin A2
int sensorPin = A4;     // The light sensor is connected to pin A4
int sensorValue;     // Variable to store the value coming from the sensor

void setup()
{

  pinMode(speakerPin, OUTPUT);     // Sets this pin to be an output
  pinMode(A3, OUTPUT);  // Sets this pin to be an output
  pinMode(10, OUTPUT);  // Sets this pin to be an output
  pinMode(9, OUTPUT);  // Sets this pin to be an output
  pinMode(6, OUTPUT);   // Sets this pin to be an output
  pinMode(sensorPin, INPUT); //
  pinMode(ground, OUTPUT);
  digitalWrite(ground, LOW);  // Turns off power to pin 11 (ground)

}

void loop()     // Runs on a loop
{

  sensorValue = analogRead(sensorPin);     // Read the value from the sensor
  delay(100);     // Delay for 1/10 of a second

  if (sensorValue < 20)// If it is dark, turn all LEDs off
  {
    digitalWrite(6, LOW);
    delay(750);        
    digitalWrite(9, LOW);
    delay(500);
    digitalWrite(10, LOW);
    delay(500);
    digitalWrite(A3, LOW);
    delay(500);
  }
  else {  //If it is not dark, turn green and blue LEDs on and play the tune, then turn on red and white LEDs
    digitalWrite(6, HIGH);
    delay(500);
    digitalWrite(9, HIGH);
    delay(500);
    scale();     // Call the scale() function
    delay(1000);     // Delay for 1 second
    digitalWrite(10, HIGH);
    delay(500);
    digitalWrite(A3, HIGH);
    delay(500);

  }
}
void beep (unsigned char speakerPin, int frequencyInHertz, long timeInMilliseconds)     // the sound producing function
{
  int x;
  long delayAmount = (long)(1000000/frequencyInHertz);
  long loopTime = (long)((timeInMilliseconds*1000)/(delayAmount*2));
  for (x=0;x<loopTime;x++)
  {
    digitalWrite(speakerPin,HIGH);
    delayMicroseconds(delayAmount);
    digitalWrite(speakerPin,LOW);
    delayMicroseconds(delayAmount);
  }
}

void scale ()//Play Mary Had a Little Lamb
{
  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,4186,500); 	//C
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2637,500); //E
  beep(speakerPin,2637,1000); //E

  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2637,1000); 	//E

  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,4186,500); 	//C
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2637,500); //E
  beep(speakerPin,2637,1000); //E

  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,2637,500); 	//E
  beep(speakerPin,2349,500); 	//D
  beep(speakerPin,4186,1000); 	//C
  beep(speakerPin,4186,1000); 	//C
}