int buzzpin= 6;
String m1="Input your number=";
int number;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(buzzpin, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
Serial.print(m1);

while(Serial.available()==0){

}
number=Serial.parseInt();
Serial.read();
Serial.println(number);

if(number>4){
  tone(buzzpin, 1000);
  delay(2000);
  noTone(buzzpin);
  delay(2000);
}
else{
  noTone(buzzpin);
}

}