<div>
  <ul>
  <%@lits.each do |lit|%>
    <div class="lit">
      <%user_id = lit.pluck(:user_id)%>
      <li class="lit_txext"><%= @user.find_by(id: user_id).pluck(user_name)%></li>
      <li class="lit_txext"><%= lit.pluck(:lit_text)%></li>
    </div>
  <%end%>
</div>

Add list of lits with users lines 1-10
Add list of lits with users lines 1-10
