index.erb

<div class="container">
  <h1>Deaf Grandma</h1>
  <% if @grandma %>
    <p>Grandma says: "<span id="grandma_says"><%= @grandma %></span>"</p>
  <% end %>

  <form action="/grandma" method="post">
    Say something to Grandma:
    <br>
    <input type="text" name="user_input">
    <input type="submit" value="Say it!">

  </form>
</div>

index.rb

get '/' do

  erb :index
end

post '/grandma' do
  # "Implement the /grandma route yourself.<br>Params: <code>#{params.inspect}</code>"
  # @response = params[:user_input]
  # if @response = @response.upd
  if params[:user_input] != params[:user_input].upcase
     @grandma ="SPEAK UP SONNY!"
  else
     @grandma ="NOT SINCE 1989!"
  end
   erb :index
end