Happy Birthday Melody with Arduino

1int melody[] = {
2  //Line 1 
3  262, 262 , 294 , 262 , 349 , 330 ,
4  //Line 2 
5  262 , 262 , 294 , 262 , 392 , 349 ,
6  //Line 3 
7  262 , 262 , 523 , 440 , 392 , 330 , 294 , 
8  //Line 4 
9  466 , 466 , 440 , 349 , 392 , 349
10};
11int duration[] = {
12  300 , 300, 600 , 600 , 600 , 1300 ,
13  300 , 300, 600 , 600 , 600 , 1300 ,
14  300 , 300, 600 , 600 , 600 , 700 , 1000 ,
15  300 , 300, 600 , 600 , 600 , 1300 ,
16};
17void setup() 
18{
19  pinMode(8,OUTPUT);
20}
21void loop() 
22{
23  for (int i = 0 ; i< sizeof(melody)/sizeof(int); i++)   
24  {
25   int durations = duration[i];
26   tone(8 , melody[i] , durations);
27
28   int puz = durations * 1.3;     
29   delay(puz);
30
31  noTone(8);   
32  }
33delay(1000);     
34}