Why won't my Arduino Uno run my door locking code? - arduino

Question

Sorry for the messy code, but I was wondering if anyone knows why it can't be run on my Arduino Uno? It's for a locking door controlled by RFID and IR remote respectively, and it stopped working for some reason when I edited the code for the void ir() section.
my code:
#include <MFRC522.h>
#include "Stepper.h"
#include "IRremote.h"
#define SS_PIN 10
#define RST_PIN 9
#define ACCESS_DELAY 2000
#define DENIED_DELAY 1000
MFRC522 mfrc522(SS_PIN, RST_PIN);
#define STEPS 32 // Number of steps per revolution of Internal shaft
Stepper small_stepper(STEPS, 2, 4, 3, 5);
int Steps2Take; // 2048 = 1 Revolution
int receiver = 8; // Signal Pin of IR receiver to Arduino Digital Pin 6
IRrecv irrecv(receiver); // create instance of 'irrecv'
decode_results results; // create instance of 'decode_results'
bool locked = true;
int steps = 500;
// Create MFRC522 instance.
/*----- Variables, Pins -----*/
/*-----( Declare objects )-----*/
// Setup of proper sequencing for Motor Driver Pins
// In1, In2, In3, In4 in the sequence 1-3-2-4
void setup()
{
irrecv.enableIRIn(); // Start the receiver
Serial.begin(9600); // Initiate a serial communication
SPI.begin(); // Initiate SPI bus
mfrc522.PCD_Init(); // Initiate MFRC522
Serial.println("Put your card to the reader...");
Serial.println();
}
void rfid()
{
// Look for new cards
if ( ! mfrc522.PICC_IsNewCardPresent())
{
return;
}
// Select one of the cards
if ( ! mfrc522.PICC_ReadCardSerial())
{
return;
}
//Show UID on serial monitor
Serial.print("UID tag :");
String content= "";
byte letter;
for (byte i = 0; i < mfrc522.uid.size; i++)
{
Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
Serial.print(mfrc522.uid.uidByte[i], HEX);
content.concat(String(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " "));
content.concat(String(mfrc522.uid.uidByte[i], HEX));
}
Serial.println();
Serial.print("Message : ");
content.toUpperCase();
if (content.substring(1) == "B9 67 D6 6E") //change here the UID of the card/cards that you want to give access
{
Serial.println("Authorized access");
Serial.println();
delay(500);
small_stepper.setSpeed(500); //Speed (Max 500)
Steps2Take = steps; // Rotate 500CW
small_stepper.step(Steps2Take); //Do the steps
delay(3000);
Steps2Take = -steps; // Rotate 500CW
small_stepper.step(Steps2Take); //Do the steps
}
else {
Serial.println(" Access denied");
delay(3000);
}
}
void ir()
{ if (irrecv.decode(&results)) // have we received an IR signal?
{
switch(results.value)
{
case 0xFFA857: //VOL - pressed
if (locked == true){
small_stepper.setSpeed(500); //Speed (Max 500)
Steps2Take = steps; // Rotate 500CW
small_stepper.step(Steps2Take); //Do the steps
locked = false;
}
case 0xFF629D: //VOL + pressed
if (locked == false){
small_stepper.setSpeed(500); //Speed (Max 500)
Steps2Take = -steps; // Rotate 500 ACW
small_stepper.step(Steps2Take); //Do the steps
locked = true;
}
}
}
}
}
void loop()
{
ir();
rfid();
}
My error:
/var/folders/5f/6gg5hb5174n1h9hmdy2pmn3w0000gp/T//ccQ6deD3.ltrans0.ltrans.o: In function main':
/private/var/folders/5f/6gg5hb5174n1h9hmdy2pmn3w0000gp/T/AppTranslocation/F6976C18-1AF6-4EB1-A8BD-1B9FBC53FC03/d/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/main.cpp:46: undefined reference toloop'
collect2: error: ld returned 1 exit status
Multiple libraries were found for "Stepper.h"
Used: /Users/Ulitimac/Documents/Arduino/libraries/Stepper
Not used: /private/var/folders/5f/6gg5hb5174n1h9hmdy2pmn3w0000gp/T/AppTranslocation/F6976C18-1AF6-4EB1-A8BD-1B9FBC53FC03/d/Arduino.app/Contents/Java/libraries/Stepper
exit status 1
Error compiling for board Arduino/Genuino Uno.
Thanks in advance!