int LED = 7;                
int inputPin = A1;               
int PIR_STATE = LOW;             
int VALUE = 0;                   
int buzz= 7;


void setup() {
  pinMode(LED, OUTPUT);   
  pinMode(buzz, OUTPUT);   
  pinMode(inputPin,INPUT);
  Serial.begin(9600);
}
 
void loop(){
  VALUE = digitalRead(inputPin); 
  if (VALUE == HIGH) {           
    digitalWrite(LED, HIGH);
    tone(buzz, 1000);
    if (PIR_STATE == LOW) {
      // we have just turned on
      Serial.println("Motion has been detected!");
      PIR_STATE = HIGH;
      delay(1000);
    }
  } else {
    digitalWrite(LED, LOW); 
    noTone(buzz);
    if (PIR_STATE == HIGH){
      // we have just turned of
      Serial.println("Motion has been stopped!");
      PIR_STATE = LOW;
      delay(1000);
    }
  }
}