private void popButtons() {
    VerticalGroup listNoob = new VerticalGroup();
    VerticalGroup listHardcore = new VerticalGroup();
    VerticalGroup listOther = new VerticalGroup();

    int y_init = Gdx.graphics.getHeight() - 100;
    int x_init = 70;

    int counter = 0;

    for (Constants.achiev_types type : Constants.achiev_types.values()) {
      AchievBtn btn = new AchievBtn(type.toString(), StylesManager.skin, type);
      btn.setBounds(x_init, y_init, 150, 35);

      y_init -= 40;
      list.add(btn);

      if (counter < 20) listNoob.addActor(btn);
      else if (counter < 40) listHardcore.addActor(btn);
      else listOther.addActor(btn);

      counter++;
    }

    // add back button
    final TextButton btn = new TextButton("Back", StylesManager.btnGray);
    btn.setBounds(Gdx.graphics.getWidth() / 2 - 75, 20, 150, 35);
    btn.addListener(
        new InputListener() {
          public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {

            return true;
          }

          public void touchUp(InputEvent event, float x, float y, int pointer, int button) {
            if (x < btn.getWidth() && x > 0 && y < btn.getHeight() && y > 0)
              maingame.setScreen(maingame.questsScreen);
          }
        });
    table.addActor(btn);

    ScrollPane sp1 = new ScrollPane(listNoob, StylesManager.skin);
    ScrollPane sp2 = new ScrollPane(listHardcore, StylesManager.skin);
    ScrollPane sp3 = new ScrollPane(listOther, StylesManager.skin);
    setSP(sp1);
    sp1.setPosition(73, 92);
    table.addActor(sp1);
    setSP(sp2);
    sp2.setPosition(72 + 212, 92);
    table.addActor(sp2);
    setSP(sp3);
    sp3.setPosition(71 + 2 * 212, 92);
    table.addActor(sp3);
  }
  public void setupGUI() {
    stage = new Stage();

    skin = new Skin(Gdx.files.internal("uiskin.json"));
    table = new Table(skin);
    // table.setBounds(0, 0, Gdx.graphics.getWidth(),
    // Gdx.graphics.getHeight());
    // table.setClip(true);

    Gdx.input.setInputProcessor(stage);

    // defaultStyle.over = skin.getDrawable("button.hover");

    TextButton fullScreenButton = new TextButton("Toglle Full Screen", skin, "default");
    fullScreenButton.addListener(
        new ClickListener() {
          @Override
          public void clicked(InputEvent event, float x, float y) {
            Config.fullscreen = !Config.fullscreen;
          }
        });

    // fullScreenButton.setFillParent(true);
    TextButton saveSettingsButton = new TextButton("Save settings", skin, "default");
    saveSettingsButton.addListener(
        new ClickListener() {
          @Override
          public void clicked(InputEvent event, float x, float y) {
            Config.reload();
            show();
          }
        });
    Container<TextButton> saveSettingContainer = new Container<TextButton>(saveSettingsButton);

    saveSettingContainer.padTop(Value.percentHeight(.6f, table));

    TextButton backButton = new TextButton("Go back", skin, "default");
    backButton.addListener(
        new ClickListener() {
          @Override
          public void clicked(InputEvent event, float x, float y) {
            Screens.setScreen(Screens.MAIN_MENU_SCREEN);
          }
        });

    VerticalGroup buttons1 = new VerticalGroup();
    buttons1.fill();
    buttons1.addActor(fullScreenButton);

    VerticalGroup buttons2 = new VerticalGroup();
    buttons2.fill();
    buttons2.addActor(saveSettingsButton);
    buttons2.addActor(backButton);

    // buttons.setPosition(Gdx.graphics.getWidth()/4,
    // Gdx.graphics.getHeight()/5);

    VerticalGroup resolution = new VerticalGroup();
    ButtonGroup<TextButton> buttonGroup = new ButtonGroup<>();
    buttonGroup.setMaxCheckCount(1);
    resolution.fill();

    transparentSkin = new Skin(new TextureAtlas("select.pack"));
    TextButtonStyle transparent = new TextButtonStyle();
    transparent.checked = transparentSkin.getDrawable("checked");
    transparent.up = transparentSkin.getDrawable("up");
    transparent.font = FontUtil.generateFont(Color.WHITE, 20);

    addResolutions(buttonGroup, transparent);

    for (TextButton b : buttonGroup.getButtons()) {
      resolution.addActor(b);
    }

    resolution.right();

    ScrollPane resolScroll = new ScrollPane(resolution);
    resolScroll.setHeight(700);

    Label fullScreenLabel = new Label("", skin);
    fullScreenLabel.addAction(
        Actions.forever(
            new Action() {
              @Override
              public boolean act(float delta) {
                if (Config.fullscreen) {
                  fullScreenLabel.setColor(Color.GREEN);
                  fullScreenLabel.setText("on");
                } else {
                  fullScreenLabel.setColor(Color.RED);
                  fullScreenLabel.setText("off");
                }
                return true;
              }
            }));

    table.setFillParent(true);
    Table left = new Table();
    left.add(buttons1).spaceBottom(Value.percentHeight(.6f, table));
    left.add(fullScreenLabel).top();
    left.row();
    // left.row();
    left.add(buttons2);
    // table.add(buttons1.left()).left();
    table.add(left).left().padLeft(Value.percentWidth(0.1f, table)).expandX();
    // table.add(fullScreenLabel).top().spaceRight(Value.percentWidth(.5f,
    // table));
    table.add(resolScroll).right().padRight(Value.percentWidth(0.1f, table));

    // table.row();
    // table.add(buttons2).bottom().left();
    // table.center();

    stage.addActor(table);

    if (Config.debug) table.setDebug(true);
  }