int led=8;
int sensor=2;
int val=0;
void setup(){
pinMode(led, OUTPUT);
pinMode(sensor, INPUT);
Serial.begin(9600);
}
void loop(){
val=digitalRead(sensor);
if(val==HIGH)
{
  tone(13,400,600);
  digitalWrite(led, HIGH);
  delay(10000);
  Serial.println("motion detected");
}
else{
    digitalWrite(led, LOW);
    delay(1000);
    Serial.println("no motion");
    }
    }