qmk-firmware/keyboards/gummykey/gummykey.h

// Copyright 2023 Gummor (@gumorr)
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

#include "quantum.h"

#define ___ KC_NO

#define LAYOUT_split_4x6_5( \
    L00, L01, L02, L03, L04, L05, R05, R04, R03, R02, R01, R00, \
    L10, L11, L12, L13, L14, L15, R15, R14, R13, R12, R11, R10, \
    L20, L21, L22, L23, L24, L25, R25, R24, R23, R22, R21, R20, \
    L30, L31, L32, L33, L34, L35, R35, R34, R33, R32, R31, R30, \
	L40, L41, L42, 		L44, L45, R45, R44, 	 R42, R41, R40 \
) \
{ \
    { L00, L01, L02, L03, L04, L05 }, \
    { L10, L11, L12, L13, L14, L15 }, \
    { L20, L21, L22, L23, L24, L25 }, \
    { L30, L31, L32, L33, L34, L35 }, \
    { L40, L41, L42, ___, L44, L45 }, \
    { R00, R01, R02, R03, R04, R05 }, \
    { R10, R11, R12, R13, R14, R15 }, \
    { R20, R21, R22, R23, R24, R25 }, \
    { R30, R31, R32, R33, R34, R35 }, \
    { R40, R41, R42, ___, R44, R45 } \
}