Motion Sensor Security Alarm

1void setup()
2{
3  
4pinMode(2,OUTPUT);
5pinMode(3,INPUT);
6delay(10000);
7}
8
9void  loop()
10{
11
12if(digitalRead(3)==HIGH)
13{
14 
15  digitalWrite(2,HIGH);
16  delay(3000);
17  digitalWrite(2,LOW);
18
19  }
20  
21  
22  }