MFRC522 Simple

#include <SPI.h>
#include <MFRC522.h>

#define SS_PIN 10
#define RST_PIN 9

MFRC522 mfrc522(SS_PIN, RST_PIN);
String card_ID="";

//Add as many cards you want
String Name1="89 48 C9 2F";
String Name2="12122112947";
String Name3="15353114169";
String Name4="13937143185";
String Name5="79 DD 81 2F";
String Name6="89 48 C9 2F";

int NumbCard[6];
int j=0;
int statu[6];
int s=0;



String Log;
String Name;
long Number;
int n ;
int ID=1;
void setup() {

  Serial.begin(9600);
  SPI.begin();
  mfrc522.PCD_Init();
  Serial3.begin(9600);
  delay(200);
   }

void loop() {

   if ( ! mfrc522.PICC_IsNewCardPresent()) {
  return;
 }

 if ( ! mfrc522.PICC_ReadCardSerial()) {
  return;
 }

 for (byte i = 0; i < mfrc522.uid.size; i++) {
     card_ID += mfrc522.uid.uidByte[i];
 }

 Serial.println(card_ID);

       if(card_ID==Name1){
       Name="First employee";
       Number="79 DD 81 2F";
       j=0;
       s=0;
      }
      else if(card_ID==Name2){
       Name="Second employee";
       Number=789101;
       j=1;
       s=1;
      }
      else if(card_ID==Name3){
       Name="Third employee";
       Number=789101;
       j=2;
       s=2;
      }
      else if(card_ID==Name4){
       Name="Fourth employee";
       Number=789101;
       j=3;
       s=3;
      }
      else if(card_ID==Name5){
       Name="Fiveth employee";
       Number=789101;
       j=4;
       s=4;
      }
      else if(card_ID==Name6){
       Name="Sixth employee";
       Number=789101;
       j=5;
       s=5;
      }
      else{

          goto cont;
     }

cont:
delay(2000);
card_ID="";

}