text: #include QMK_KEYBOARD_H
  
  // Layer shorthand
  #define _QW 0
  #define _CM 1
  #define _FN 2
  
  typedef enum {
    NONE_NONE,
    SINGLE_TAP,
    SINGLE_HOLD,
    DOUBLE_SINGLE_TAP
  } td_state_t;
  
  static td_state_t td_state = NONE_NONE;
  int cur_dance (qk_tap_dance_state_t *state);
  void altlp_finished (qk_tap_dance_state_t *state, void *user_data);
  void altlp_reset (qk_tap_dance_state_t *state, void *user_data);
  
  // Four differend underglow states for 2 language layouts x 2 states of colemak layer
  enum layer_states {
    S_ENGLISH,
    S_COLEMAK,
    S_CRUSSIAN,
    S_QRUSSIAN
  } l_state = S_ENGLISH;
  
  // CLMK to toggle colemak (active only with english qwerty, saves intent in russian but does nothing untill switched back to english)
  // RNBW - rainbow underglow
  // PING - ping pong underglow
  // SP_UP/DW - underglow speed controls
  enum custom_keycodes {
    STUB = SAFE_RANGE,
    CLMK,
    RNBW,
    PING,
    SP_UP,
    SP_DW
  };
  
  // Escape if taped, FN layer mod if held
  enum tapdance_codes {
    LESC
  };
  
  bool sstate = false;
  int rgb = 0;
  int speed = 300;
  
  void set_colors(int r, int g, int b) {
    for(int i = 0; i<6; i++) {
      sethsv(r, g, b, (LED_TYPE *)&led[i]);
    }
    rgblight_set();
  }
  
  void update_led_state_c(void) {
    if (rgb>0) return;
    if (td_state == SINGLE_HOLD) set_colors(HSV_BLUE);
    else {
      if (l_state == S_ENGLISH) set_colors(HSV_RED);
      if (l_state == S_QRUSSIAN) set_colors(HSV_GREEN);
      if (l_state == S_COLEMAK) set_colors(HSV_YELLOW);
      if (l_state == S_CRUSSIAN) set_colors(85, 100, 100);
    }
  }
  
  int cur_dance (qk_tap_dance_state_t *state) {
    if (state->count == 1) {
      if (state->interrupted && state->pressed) { return SINGLE_HOLD; }
      else if (!state->pressed) { return SINGLE_TAP; }
      else { return SINGLE_HOLD; }
    }
    if (state->count == 2) { return DOUBLE_SINGLE_TAP; }
    else { return 3; }
  }
  
  // Tapdance code stolen long time ago from one of the forum answers i found related to my problem, sadly can't provide link for the credits
  void lesc_finished (qk_tap_dance_state_t *state, void *user_data) {
    td_state = cur_dance(state);
    switch (td_state) {
      case SINGLE_TAP:
        register_code16(KC_ESC);
        break;
      case SINGLE_HOLD:
        layer_on(_FN);
        update_led_state_c();
        sstate = false;
        break;
      case DOUBLE_SINGLE_TAP:
        break;
      case NONE_NONE:
        break;
    }
  }
  
  void lesc_reset (qk_tap_dance_state_t *state, void *user_data) {
    switch (td_state) {
      case SINGLE_TAP:
        unregister_code16(KC_ESC);
        break;
      case SINGLE_HOLD:
        layer_off(_FN);
        if (sstate == false) {
          register_code16(KC_ESC);
          unregister_code16(KC_ESC);
        }
        break;
      case DOUBLE_SINGLE_TAP:
        break;
      case NONE_NONE:
        break;
    }
    td_state = NONE_NONE;
    update_led_state_c();
  }
  
  qk_tap_dance_action_t tap_dance_actions[] = {
    [LESC] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, lesc_finished, lesc_reset)
  };
  
  const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    [_QW] = LAYOUT_ortho_5x15( /* QWERTY */
  KC_GRV,  KC_1,       KC_2,    KC_3,    KC_4,    KC_5,    KC_MINS, RNBW,    KC_EQL,  KC_6,    KC_7,    KC_8,    KC_9,    KC_0,      KC_BSPC,
  KC_TAB,  KC_Q,       KC_W,    KC_E,    KC_R,    KC_T,    KC_LBRC, KC_BSLS, KC_RBRC, KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,      KC_QUOT,
  KC_CAPS, KC_A,       KC_S,    KC_D,    KC_F,    KC_G,    CLMK,    KC_DEL,  SP_UP,   KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN,   KC_ENT,
  KC_LSFT, KC_Z,       KC_X,    KC_C,    KC_V,    KC_B,    _______, KC_UP,   SP_DW,   KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,   KC_RSFT,
  KC_LCTL, LSFT(KC_9), KC_LALT, KC_LGUI, TD(LESC),KC_SPC,  KC_LEFT, KC_DOWN, KC_RGHT, KC_ENT,  TD(LESC),KC_RGUI, KC_RALT, RSFT(KC_0),KC_RCTL
    ),
    [_CM] = LAYOUT_ortho_5x15( /* COLEMAK */
  _______, _______, _______, _______, _______, _______, _______, PING,    _______, _______, _______, _______, _______, _______, _______,
  _______, KC_Q,    KC_W,    KC_F,    KC_P,    KC_Z,    _______, _______, _______, KC_J,    KC_L,    KC_U,    KC_Y,    KC_SCLN, KC_SLSH,
  _______, KC_A,    KC_R,    KC_S,    KC_T,    KC_G,    _______, _______, _______, KC_M,    KC_N,    KC_E,    KC_I,    KC_O,    _______,
  _______, KC_X,    KC_V,    KC_C,    KC_D,    KC_B,    _______, _______, _______, KC_K,    KC_H,    KC_DOT,  KC_COMM, KC_QUOT, _______,
  _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______
    ),
    [_FN] = LAYOUT_ortho_5x15( /* FUNCTION */
  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_P7,   KC_P8,   KC_P9,  KC_F7,   KC_F8,   KC_F9,   KC_F10,        KC_F11,        KC_F12,
  RESET,   KC_BTN1, KC_MS_U, KC_BTN2, KC_BTN3, KC_WH_U, KC_P4,   KC_P5,   KC_P6,  _______, _______, _______, RSFT(KC_MINS), LSFT(KC_MINS), _______,
  _______, KC_MS_L, KC_MS_D, KC_MS_R, KC_MINS, KC_WH_D, KC_P1,   KC_P2,   KC_P3,  _______, KC_PPLS, KC_ACL0, KC_ACL1,       KC_ACL2,       _______,
  _______, KC_ACL0, KC_ACL1, KC_ACL2, KC_WH_L, KC_WH_R, KC_NLCK, KC_PGUP, KC_P0,  _______, _______, _______, _______,       _______,       _______,
  RGB_TOG, _______, _______, _______, KC_BSPC, KC_BSPC, KC_HOME, KC_PGDN, KC_END, KC_BSPC, KC_BSPC, _______, _______,       _______,       _______
    )
  };
  
  bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    if(keycode != TD(LESC))
      sstate = true;
    switch (keycode) {
      case SP_UP:
        if (speed>25)
          speed -= 25;
        break;
      case SP_DW:
        if (speed < 1000)
          speed += 25;
        break;
      case RNBW:
        if(record->event.pressed) {
          rgb = rgb == 0 ? 1 : 0;
          update_led_state_c();
        }
        break;
      case PING:
        if(record->event.pressed) {
          rgb = rgb == 0 ? 2 : 0;
          update_led_state_c();
        }
        break;
      case CLMK:
        if(record->event.pressed) {
          if (l_state == S_COLEMAK) {
            layer_off(_CM);
            l_state = S_ENGLISH;
          }
          else if (l_state == S_ENGLISH) {
            layer_on(_CM);
            l_state = S_COLEMAK;
          }
          else if (l_state == S_CRUSSIAN) { l_state = S_QRUSSIAN; }
          else if (l_state == S_QRUSSIAN) { l_state = S_CRUSSIAN; }
        }
        update_led_state_c();
        break;
      case KC_CAPS:
        if(record->event.pressed) {
          if (l_state == S_ENGLISH) l_state = S_QRUSSIAN;
          else if (l_state == S_QRUSSIAN) l_state = S_ENGLISH;
          else if (l_state == S_COLEMAK) {
            layer_off(_CM);
            l_state = S_CRUSSIAN;
          }
          else if (l_state == S_CRUSSIAN) {
            layer_on(_CM);
            l_state = S_COLEMAK;
          }
          update_led_state_c();
        }
        break;
    }
    return true;
  }
  
  void matrix_init_user(void) { }
  
  // Rainbow globals
  int t = 0;
  int rc = 0;
  int col = 0;
  bool right = false;
  
  void matrix_scan_user(void) {
    if (rgb==0) return; // Do nothing each tick right away if neither of animations enabled
    if (rgb==1) {
      if (rc == 0) {
        rc = speed;
        for(int i = 0; i<6; i++) {
          sethsv(42*((t+i)%6), 255, 255, (LED_TYPE *)&led[i]);
        }
        rgblight_set();
        t++; t = t % 6;
      }
    } else if (rgb==2) {
      if (rc == 0) {
        rc = speed;
        col = (col + 1) % 36;
        for (int i = 0; i<6; i++) {
          if (i==t)
            sethsv(42*(((col-1)/6)%6), 255, 255, (LED_TYPE *)&led[(right ? t : 5-t)]);
          else
            sethsv(0, 0, 0, (LED_TYPE *)&led[right ? i : 5-i]);
        }
        rgblight_set();
        t++; t = t % 6;
        if (t == 0) right = !right;
      }
    }
    rc--;
  }
  
  void led_set_user(uint8_t usb_led) { }
  