/*Let’s Make Some Noise */

int buzzer = 12;//the pin of the active buzzer
void setup()
{
pinMode(buzzer,OUTPUT);//initialize the buzzer pin as an output
}
void loop()
{
unsigned char i;
while(1)
{
  //output and frequency, repeating 80 times
  for(i=0;i<80;i++)
  {
   digitalWrite(buzzer,HIGH);
   delay(1);//wait for 1ms
   digitalWrite(buzzer,LOW);
   delay(1);//wait for 1ms
   }
   //output another frequency, repeating 100 times
    for(i=0;i<100;i++)
     {
       digitalWrite(buzzer,HIGH);
       delay(2);//wait for 2ms
       digitalWrite(buzzer,LOW);
       delay(2);//wait for 2ms
     }
 }
}