qmk_firmware/keyboards/bm16s/keymaps/default/keymap.c

#include QMK_KEYBOARD_H

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
	[0] = LAYOUT_ortho_4x4(
		KC_KP_7, KC_KP_8, KC_KP_9, MO(1),   \
		KC_KP_4, KC_KP_5, KC_KP_6, KC_PMNS, \
		KC_KP_1, KC_KP_2, KC_KP_3, KC_PPLS, \
		KC_KP_0, KC_PDOT, KC_PCMM, KC_PENT  \
	),
	[1] = LAYOUT_ortho_4x4(
		RESET,   BL_STEP, _______, KC_VOLU, \
		BL_TOGG, BL_DEC,  BL_INC,  KC_VOLD, \
		RGB_TOG, RGB_MOD, RGB_HUI, KC_MUTE, \
		RGB_SAI, RGB_SAD, RGB_HUD, _______  \
	),
};