Security System

int sensor=11;
int sensor_value;
const int trigger=2;
const int echo=3;
long duration;
int distance;
int button=4;


void setup() 
{
  // put your setup code here, to run once:
  pinMode(sensor, INPUT);
pinMode(10,OUTPUT);
pinMode(trigger,OUTPUT);
pinMode(echo,INPUT);
  pinMode(13,OUTPUT);
  Serial.begin(9600);
  
  
}

void loop() {
  // put your wwmain code here, to run repeatedly:
 
int buttonState=digitalRead(button);

if(buttonState==1)
{ 

sensor_value=digitalRead(sensor);
Serial.println("    ");
 Serial.println(    sensor_value);
 digitalWrite(trigger,LOW);
 delayMicroseconds(2);
 digitalWrite(trigger,HIGH);
 delayMicroseconds(10);
 digitalWrite(trigger,HIGH);
 duration=pulseIn(echo,HIGH);  
 distance= duration*(0.036/2);
 
 if(distance>5)
 {
  digitalWrite(10,HIGH);
  delay(100);
  digitalWrite(13,HIGH);
  delay(100);
  digitalWrite(13,LOW);
  delay(100);
  Serial.println("Distance: ");
 Serial.println(distance);
 }
 else
 {
   digitalWrite(10,LOW);
 }

if(sensor_value==1)
{
  
  digitalWrite(13, HIGH);
  delay(1000);
   
 
  
 Serial.println("Motion detected");
 }
else if(sensor_value==0)
{
  digitalWrite(13,LOW);
 
  Serial.println("Motion not detected");
  
}
}
else
{

}

 
 
 
}