int Buzzer = 7;
int SD = 3;
int STRSD; 

void setup() {
  // put your setup code here, to run once:
pinMode(Buzzer, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  tone(Buzzer, 50);
  delay(800);
  noTone(5000);
  tone(Buzzer, 500);
  delay(500);
  noTone(5000);
  delay(100);

  STRSD == digitalRead(SD);
  if (STRSD == HIGH) {
    delay(1000);

  }

}