Motion Detector system

#include <SoftwareSerial.h>

SoftwareSerial SIM900A(0,1);

int StopSending =0;

int WindowClose=8; 
int WindowOpen=9;
int Pir=2;
int EngineSwitch=3;
int WindowSwitch=4;
int LedEngineRun=6;
int LedEngineStop=7;
int PirLedStatus=5;

int Counter=0;


void setup(){

  //Serial.begin(9600);
  SIM900A.begin(9600);
  
  pinMode(EngineSwitch, INPUT_PULLUP);
  pinMode(Pir, INPUT_PULLUP);
  pinMode(WindowSwitch, INPUT_PULLUP);
  pinMode(WindowClose, OUTPUT); 
  pinMode(WindowOpen, OUTPUT); 
   pinMode(LedEngineRun, OUTPUT); 
  pinMode(LedEngineStop, OUTPUT);
  pinMode(PirLedStatus, OUTPUT);  


}

void loop()
{

  int EngineSwitchValue = digitalRead(3);
  int WindowSwitchValue = digitalRead(4);
  int PirValue = digitalRead(2);
  
  ///////////////////////////////////////////////////////////////////////////pir led status//////////////////
  
   if (PirValue == HIGH)
  {
    
     digitalWrite(PirLedStatus, HIGH);
     
  } 
  
   else if (PirValue == LOW) 
  {
    
     digitalWrite(PirLedStatus, LOW);
     
  } 
 ///////////////////////////////////////////////////////////ENGINE led status


  if (EngineSwitchValue == HIGH) 
  {
     digitalWrite(LedEngineStop, LOW);
     digitalWrite(LedEngineRun, HIGH);
     StopSending =0;
  } 
  else 
  {
     digitalWrite(LedEngineStop,HIGH);
     digitalWrite(LedEngineRun, LOW);
  
  }
  
///////////////////////////////////////////////////////////////////power window relay/////////////////


  

  if (WindowSwitchValue == LOW && Counter == 0 && EngineSwitchValue == HIGH)
  {
     Counter=1;
     digitalWrite(WindowClose, LOW);
     digitalWrite(WindowOpen, HIGH);
     delay(3000);
     digitalWrite(WindowClose, LOW);
     digitalWrite(WindowOpen, LOW);
    
   
  } 
 else if (WindowSwitchValue == LOW && Counter == 1 && EngineSwitchValue == HIGH)
  {
     Counter=0;
     digitalWrite(WindowClose, HIGH);
     digitalWrite(WindowOpen, LOW);
     delay(3000);
     digitalWrite(WindowClose, LOW);
     digitalWrite(WindowOpen, LOW);
     
    
  } 

///////////////////////////////////////////////////////////////////detect baby and engine off/////////////////


  

  if (PirValue == HIGH && EngineSwitchValue == LOW &&  StopSending == LOW) //CHILD INSIDE CAR WITH ENGINE STOP
  {
     Counter=1;
     digitalWrite(WindowClose, LOW);
     digitalWrite(WindowOpen, HIGH);
     delay(3000);
     digitalWrite(WindowClose, LOW);
     digitalWrite(WindowOpen, LOW);
     
     SIM900A.println("AT+CMGF=1");    
     delay(1000);  
            
     SIM900A.println("AT+CMGS=\"+60126199749\"\r");
     delay(1000);
            
     SIM900A.println("Child On Board!!");
     delay(100);
            
     SIM900A.println((char)26);// ASCII code of CTRL+Z
     delay(1000);
              
     StopSending =1;
              
     delay(500);
          
   
  } 

 
  
}