[Elegoo] Alarm system!

#include "IRremote.h"

int receiver = 11; // Signal Pin of IR receiver to Arduino Digital Pin 11

/*-----( Declare objects )-----*/
IRrecv irrecv(receiver);     // create instance of 'irrecv'
decode_results results;      // create instance of 'decode_results'

#define trig 3
#define echo 2
#define omergurd 4
int range = 100;
int onoff = 30;
bool triggered = false;
bool enabled = true;

void annoy(int freq, int dur)
{
   tone(omergurd,freq,dur);
   delay(dur);
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin (9600);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  irrecv.enableIRIn();
}

void loop() {
  if (irrecv.decode(&results)) // have we received an IR signal?
  {
    translateIR();
    irrecv.resume(); // receive the next value
  }

  if(triggered)
  {
    annoy(4000,500);
    exit;
  }
  // put your main code here, to run repeatedly:
  int duration, distance;
  digitalWrite(trig,HIGH);
  delayMicroseconds(1000);
  digitalWrite(trig,LOW);
  duration = pulseIn(echo, HIGH);
  distance = (duration/2) / 29.1;
  Serial.print(distance);
  Serial.print(" cm ");
  if( distance < range && enabled && !triggered)
  {
    //annoy(map(distance, 0, range, 2093, 22));
    annoy(20,2000);
    triggered = true;
    Serial.print(" TRIGGERED!");
  }
  Serial.print("\n");
  delay(500);
}

void enabledisable()
{
   onoff = 30;
   if(!enabled){
     Serial.println("DISABLED.");
     onoff = 5000;
   }
   if(enabled){
     Serial.println("ENABLED.");
     onoff = 30;
   }
    annoy(onoff,500);
}
/*-----( Function )-----*/
void translateIR() // takes action based on IR code received
{
  Serial.print(int(results.value));
  if(int(results.value) == 9755)
  {
   if(triggered)
   {
     annoy(20,500);
     annoy(20,500);
     triggered=false;
     delay(500);
   }
    enabled = !enabled;
    enabledisable();
  }
  if(int(results.value) == 19227) // if we pressed Play/Pause button
  {
    if(!triggered)
    {
       enabled = !enabled;
       enabledisable();
    }
    else
    {
      delay(500);
      annoy(20,500);
      annoy(20,500);
      triggered = false;
    }
  }
  delay(500); // Do not get immediate repeat
} //END translateIR