qmk-firmware/keyboards/splitreus62/splitreus62.h

#pragma once

#include "quantum.h"

#define LAYOUT(\
    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, L43, L44, L45, L55,             R55, R45, R44, R43, 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, L43, L44, L45 },     \
        { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, L55 },   \
\
        { 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, R43, R44, R45 },    \
        { KC_NO, KC_NO, KC_NO, KC_NO, KC_NO, R55 }   \
}