long randomValue;
bool checkPalindrome(int n);

void setup() {
  pinMode(7, OUTPUT);
  randomSeed(analogRead(0));

}

void loop() {
  delay(50);
  randomValue=random(1000-9999);
  if(checkPalindrome(randomValue))
  {
    digitalWrite(7, HIGH);
    delay(1000);
    digitalWrite(7, LOW);
  }

}
bool checkPalindrome(int n)
{
  int temp=n;
  int sum=0,r;
  while(n>0)
  {
    r=n%10;
    sum=(sum*10)+r;
    n=n/10;
  }
  if(sum==temp)
  return true;
  else
  return false;
}