int sensor=2;
int led=13;
int buzzer=9;
int state=LOW;
int val=0;

 void setup() {
 pinMode (sensor, INPUT);
 pinMode (led, OUTPUT);
 pinMode (buzzer, OUTPUT);
 Serial.begin(9600);
}

 void loop() {
 val-digitalRead (sensor);
 if (val==HIGH) {
 digitalWrite (led, HIGH);
 digitalWrite (buzzer, HIGH);
 delay (400);
 }
 else{
 digitalWrite (led,LOW);
 digitalWrite (buzzer,LOW);
}
}