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

#include QMK_KEYBOARD_H

const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

  LAYOUT(
    KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
    KC_P7,   KC_P8,   KC_P9,   KC_PPLS,
    KC_P4,   KC_P5,   KC_P6,   KC_HOME,
    KC_P1,   KC_P2,   KC_P3,   KC_END,
    KC_P0,   KC_PEQL, KC_PDOT, KC_PENT
  ),

};

void persistant_default_layer_set(uint16_t default_layer) {
}

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  switch (keycode) {
  }
  return true;
}