qmk_firmware/keyboards/xd004/xd004.h

#pragma once

#include "quantum.h"
//#include "led.h"

/* XD60 Keymap Definition Macro */
/*
    +--------------------------------+
    |   K0      K1      K2      K3   [----- USB
    +--------------------------------+
*/
#define LAYOUT_all(K00, K01, K02, K03) \
    {                                  \
        { K00, K01, K02, K03 }         \
    }