Arduino Lab 7: Buzzer

Purpose:
This lab will teach you how to make music with piezo element.

Equipment:
-1 piezo element 
-1 wire (any colour) 
-2 wires (black) 
-1 Arduino UNO 
-1 breadboard 
-1 USB cable

Program Details:
-Download Arduino here

Time to Program and Complete:
-Approximately 30 min

Results:
-The pins under the buzzer were not in the correct holes, but after I fixed them the buzzer made music

Photo/Video:

Program:
int speakerPin = 9;
int length = 15; 
char notes[] = "ccggaagffeeddc ";
int beats[] = { 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 4 };
int tempo = 300;
void playTone(int tone, int duration) 
{
  for (long i = 0; i < duration * 1000L; i += tone * 2)
  {
    digitalWrite(speakerPin, HIGH);
    delayMicroseconds(tone);
    digitalWrite(speakerPin, LOW);
    delayMicroseconds(tone);
  }
}
void playNote(char note, int duration)
{
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C' };
  int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014, 956 };
  for (int i = 0; i < 8; i++)
  {
     if (names[i] == note) 
    {
      playTone(tones[i], duration);
    }
  }
}
void setup()
{
  pinMode(speakerPin, OUTPUT);
}
void loop()
{
  for (int i = 0; i < length; i++)
  {
    if (notes[i] == ' ') 
    {
      delay(beats[i] * tempo);
    }
    else
    {
      playNote(notes[i], beats[i] * tempo);
     }
    delay(tempo / 2);
  }
}

Program Modifications:
-There were none

Helpful Tips:
-Check all the parts inserted

References:
-Arduino website: arduino.cc
-New Innovators: Lab 7