LiveSliverList.options(
    options: LiveOptions(
      delay: Duration.zero,
      reAnimateOnVisibility: false,
      showItemDuration: Duration(milliseconds: 500),
      showItemInterval: Duration(milliseconds: 50),
    ),
    controller: _scrollController,
    itemCount: countries.length,
    itemBuilder: (context, index, animation) {
      return FadeTransition(
        opacity: animation,
        child: SlideTransition(
          position: Tween<Offset>(
            begin: Offset(0, 0.3),
            end: Offset.zero,
          ).animate(animation),
          child: ListItem(
            title: countries[index],
          ),
        ),
      );
    },
  );