Instructions

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int buzzer=8; // I/O pin for buzzer
void setup() {
pinMode(buzzer,OUTPUT); // sets pin as output
}
void loop() {
unsigned char i,j; // defines variable
while(1){
for(i=0;i<80;i++) { // makes frequency sound
digitalWrite(buzzer,HIGH); // sound
delay(1); // 1ms delay
digitalWrite(buzzer,LOW); // no sound
delay(1); // 1ms delay
}
for(i=0;i<100;i++) { // makes frequency sound
digitalWrite(buzzer,HIGH); // sound
digitalWrite(buzzer,LOW); // no sound
delay(2); // 2ms delay
}
}
}