gistfile1.erb

<div class="ui secondary segment">
    <div class="field">
      <%= f.label :title %>
      <%= f.text_field :title %>
    </div>
    <div class="field">
      <%= f.label :content %>
      <%= f.text_area :content, as: :text%>
    </div>
    <div class="three wide field">
      <%= f.label :deadline %>
      <%= f.datetime_select :deadline, as: :datetime %>
    </div>

    <%= f.submit class: "ui submit blue button" %>
    <% end %>
  </div>