int val;
int LDRpin = A0;
int IRsensor = D5;
int IRsensorstate = 0;
int LED1 = D2;
int buzzer = D4;
void setup() {
  pinMode(IRsensor, INPUT);
  pinMode(LED1, OUTPUT);
  pinMode(buzzer, OUTPUT);
  Serial.begin(9600);
}
void loop() {
  val = digitalRead(IRsensor);
  if (val == 0) {
    digitalWrite(LED1, HIGH);
    digitalWrite(buzzer, HIGH);
    delay(500);
  }
  else {
    digitalWrite(LED1, LOW);
    digitalWrite(buzzer, LOW);
  }
}// end of loop