text: #include QMK_KEYBOARD_H
  
  #define _______ KC_TRNS
  #define XXXXXXX KC_NO
  
  enum custom_keycodes {
      KC_P00 = SAFE_RANGE
  };
  
  bool process_record_user(uint16_t keycode, keyrecord_t *record) {
      if (record->event.pressed) {
          switch(keycode) {
              case KC_P00:
                  // types Numpad 0 twice
                  SEND_STRING(SS_TAP(X_KP_0) SS_TAP(X_KP_0));
                  return false;
          }
      }
      return true;
  };
  
  const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    [0] = LAYOUT_ortho_5x4(
      TG(1),   KC_PSLS, KC_PAST, KC_PMNS, \
      KC_P7,   KC_P8,   KC_P9,   KC_PPLS, \
      KC_P4,   KC_P5,   KC_P6,   KC_PPLS, \
      KC_P1,   KC_P2,   KC_P3,   KC_PENT, \
      KC_P0,   KC_P00,  KC_PDOT, KC_PENT  \
    ),
  
    [1] = LAYOUT_ortho_5x4(
      _______, _______, _______, _______, \
      KC_HOME, KC_UP,   KC_PGUP, _______, \
      KC_LEFT, XXXXXXX, KC_RGHT, _______, \
      KC_END,  KC_DOWN, KC_PGDN, _______, \
      KC_INS,  XXXXXXX, KC_DEL,  _______  \
    ),
  };
  