qmk-firmware/keyboards/yatara/drink_me/keymaps/cheshire_cat/keymap.c

#include QMK_KEYBOARD_H

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    [0] = LAYOUT(
        KC_LEFT,
        KC_DOWN,
        KC_UP,
        KC_RIGHT
    )
};