app/views/clients/_form.html.erb
<section class="form">
<%= form_for @client do |f| %>
<p><%= f.text_field :name, placeholder: 'First name' %></p>
<p><%= f.text_field :last_name, placeholder: 'Last name' %></p>
<p><%= f.text_field :address, placeholder: 'Address' %></p>
<p><%= f.text_field :postcode, placeholder: 'Postcode' %></p>
<p><%= f.text_field :phone, placeholder: 'Phone' %></p>
<%= f.submit %>
<% end %>
</section>