Need help with why my wireless stepper code won't work?

I’m trying to set up my stepper motor with my IR sensor and Uno board (attachment of the schematic) and keep coming across and error in my code and don’t know what to do. Help?

#include "Stepper.h"
#include "IRremote.h"

/*----- Variables, Pins -----*/
#define STEPS  32   // Number of steps per revolution of Internal shaft
int  Steps2Take;  // 2048 = 1 Revolution
int receiver = 6; // Signal Pin of IR receiver to Arduino Digital Pin 6

/*-----( Declare objects )-----*/
// Setup of proper sequencing for Motor Driver Pins
// In1, In2, In3, In4 in the sequence 1-3-2-4

Stepper small_stepper(STEPS, 8, 10, 9, 11);
IRrecv irrecv(receiver);    // create instance of 'irrecv'
decode_results results;     // create instance of 'decode_results'

void setup()
  irrecv.enableIRIn(); // Start the receiver

void loop()
if (irrecv.decode(&results)) // have we received an IR signal?



      case 0xFF629D: // UP button pressed
                      small_stepper.setSpeed(500); //Max seems to be 700
                      Steps2Take  =  2048;  // Rotate CW

      case 0xFFA857: // DOWN button pressed
                      Steps2Take  =  -2048;  // Rotate CCW
      irrecv.resume(); // receive the next value

}/* --end main loop -- */

Here is the error that it gives
Arduino: 1.8.0 (Mac OS X), Board: “Arduino/Genuino Uno”

/Applications/ error: ‘TKD2’ was not declared in this scope
int RECV_PIN = TKD2; // the pin the IR receiver is connected to
exit status 1
Error compiling for board Arduino/Genuino Uno.

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.

And you did not think about googling for "error: 'TKD2' was not declared in this scope"?

That still doesn’t help me :frowning:
I’m 100% new to code and am having a difficult time.

Reading from the web:

"Removing the files - libraries\RobotIRremote\IRremoteTools.cpp and
libraries\RobotIRremote\IRremoteTools.h solved the problem. They are
example files which somehow are getting included. You can move those two
files to some other location as backup."

Quit the IDE, do that, try again